2 letters:
ia

3 letters:
dia, jia, lia, mia, pia, ria, tia, zia

4 letters:
asea, be a, bria, chia, dhia, gaea, idea, ikea, leah, orea, rhea, shia, snia, thea, urea

5 letters:
-acea, -pnea, aeaea, afiaa, ageia, algea, aliya, alyea, ansia, areia, ashia, asiya, assia, badea, basia, berea, butea, canea, casia, cerea, cleah, corea, dfmea, dvd a, dvi a, freia, gerea, gudea, h-iia, hakea, hosea, hydea, ideia, isaea, jalea, judea, kania, kezia, korea, kreia, kriya, lumea, lutea, maria, mbeya, medea, minea, mit'a, nekia, obeah, omiya, oriya, perea, pfmea, pgmea, phaea, pnoea, priya, qui a, rakia, rotea, rrhea, sea a, see a, she a, shiah, sofia, speea, spnea, stria, subia, talea, toria, tr ea, urrea, usnea, valea, wikia, yulia, zoaea

6 letters:
-pnoea, -rrhea, achaea, acorea, actaea, adenia, adygea, aglaea, aliyah, althea, amalea, apamea, aperea, aphaea, apnoea, arbeia, atypia, badeah, baphia, belyea, cardea, chiria, cms ea, cobaea, corsia, cosmea, crimea, cuphea, cyanea, danaea, duryea, ecosia, emydea, free a, frisia, garcia, geagea, gensia, gibeah, glugea, hadiya, hyalea, hygiea, ikaria, ipomea, ishiah, iturea, japhia, jubaea, kaliya, kareah, kariya, keshia, keziah, latria, leigha, lenaea, mageia, mammea, mariya, mmpi a, moriya, napaea, navsea, nekyia, ngfi a, nicaea, niyyah, nordea, ochrea, orgyia, ostrea, peraea, philia, phthia, pistia, pitsea, popiah, rakiya, richea, rrhoea, saliya, sofiya, sophia, tashia, thee a, tree a, tudiya, uforia, unghia, wadiya, yehiya, yttria, yuliya, zakiya, zareah

7 letters:
-rrhoea, acrisia, aleshia, alethea, althaea, andreea, apoidea, aprilia, asebeia, astraea, bettiah, blighia, bn fmea, bo-hiya, boshiya, brachia, cananea, chamaea, ciaccia, cinerea, circaea, corokia, cumacea, cyberia, cypraea, dataria, diarhea, diarrea, digenea, dionaea, diriyah, disgaea, dyspnea, eimeria, epigaea, eritrea, eucleia, eupnaea, eupnoea, europea, fumaria, galatea, galeria, galilea, gazania, gonidia, gonorea, hialeah, himalia, hygieia, hypogea, idumaea, indriya, ituraea, jambiya, jiraiya, karakia, kinesia, lemuria, lernaea, liguria, limnaea, linaria, linnaea, lobosea, lunaria, lymnaea, machiya, makatea, malakia, marsiya, megalia, mejilla, minebea, miseria, moschea, nadhiya, nemesea, neogaea, niceaea, nicosia, nobatia, nopalea, notogea, ommatea, panacea, panarea, pangaea, papaleo, phocaea, plataea, pompeia, psophia, puparia, qiddiya, raiatea, retinea, romalea, rosacea, rosalia, rufiyaa, sabinea, samaria, scleria, seraiah, shimeah, sirenia, spiraea, spyeria, subarea, sunniah, taqiyya, tarpeia, teresia, three a, tolmiea, urginea, visalia, welchia, weldiya

8 letters:
abrachia, acheiria, ajdabiya, alashiya, aletheia, amalthea, anamaria, apatheia, aposthia, argentia, argyreia, aristeia, asamblea, athenaea, barathea, barbarea, bergenia, bossiaea, bramalea, brodiaea, caesarea, calcanea, casiopea, cenchrea, cerealia, chaldaea, chiminea, clamidia, cooperia, cordelia, cytherea, dahabeah, dahabiah, degree a, diarreah, diarrhea, diomedea, dobrogea, dodonaea, dorothea, drexciya, dulcinea, dysaphia, dyspnoea, eusuchia, galabiya, galleria, gastraea, gephyrea, gonorhea, gonorrea, gryphaea, herzliya, horimiya, hymenaea, jabaliya, justicia, kamaiyah, kidzania, killilea, kohleria, ksatriya, lakeshia, larvacea, linaceae, machinea, maclurea, mantinea, mausolea, melchiah, mithraea, mythodea, nahariya, necochea, notogaea, nymphaea, ostracea, otorrhea, palmaria, panacaea, panaceia, parkeria, parzania, passerea, periboea, photopea, physalia, piqueria, pizzeria, platalea, politeia, potidaea, priapeia, psoralea, pulastya, purpurea, pyorrhea, radialia, rehabiah, rubidgea, sadleria, sattriya, schizaea, scyllaea, shenseea, sigiriya, spiralia, sripriya, st lucia, synaphea, tabebuia, tanzania, testacea, thiourea, timothea, tinsukia, tornaria, tortilla, tsakonia, ubeidiya, valkyria, valkyrie, walkyrie, wallacea

9 letters:
abyssinia, adrasteia, ahmadiyya, aigialeia, akbariyya, al-maarij, albuginea, amalthaea, annamaria, antheraea, arctogaea, asabiyyah, asiphonea, asteridea, ave maria, balmorhea, batiniyya, batrachia, berachiah, bilateria, biografia, biophilia, cassiopea, chuvashia, cinquedea, collinsia, contrasea, cornaceae, cyberrhea, decumaria, diapensia, diarrhoea, enkrateia, epineuria, foresee a, furusiyya, geoffroea, gonorrhea, gordiacea, gorgoneia, guberniya, hashiriya, hibbertia, hirudinea, hydnaceae, hypopnoea, isaipriya, jellabiya, juvenilia, kadhimiya, kahikatea, kalamaria, kampuchea, khakassia, lambertia, laminaria, leitneria, logorrhea, malpighia, manussiha, menologia, menorrhea, mertensia, mysidacea, naegleria, nasiriyah, naumachia, ochnaceae, otorrhoea, parroquia, peritonea, polymeria, porphyria, promethea, propylaea, pyorrhoea, pyramidia, qadariyah, qadiriyya, remipedia, roystonea, saawariya, saizeriya, sanguinea, saussurea, seborrhea, senusiyya, souvlakia, spathodea, spermidia, stanhopea, stearrhea, thaliacea, theileria, thermobia, tortilla', tubularia, veneracea, wikipedia, zabaniyah, zabaniyya, zaidiyyah, zelotypia

10 letters:
abecedaria, acrophilia, ahmadiyyah, ailuroidea, amblyaphia, amenorrhea, amniorrhea, antennaria, arimathaea, basophilia, bengoechea, bhanupriya, brugmansia, caballeria, callisteia, cassiopeia, cavalleria, choghadiya, cirripedia, cochlearia, cronologia, cypripedia, emojipedia, endothelia, entocornea, flindersia, formicaria, genus rhea, gonorrhoea, hariprriya, hydrorrhea, hyperaphia, hyperpnoea, iphigeneia, jahiliyyah, kshattriya, lernaeacea, leucorrhea, leukorrhea, logophilia, logorrhoea, lygophilia, lysimachia, menorrhoea, metrorrhea, mulukhiyah, mythopoeia, orthopnoea, pathopoeia, phoneutria, physemaria, pontederia, rangrasiya, rhinorrhea, sagittaria, salisburia, seborrhoea, sialorrhea, silicoidea, solanaceae, solpugidea, sonchiriya, succedanea, sufganiyah, tecnologia, tijaniyyah, trachearia, tribrachia, utsunomiya, zerophilia

11 letters:
7-keto-dhea, abdominalia, adenophorea, akkermansia, al-wataniya, alislamiyya, amenorrhoea, ascidioidea, black maria, blechnaceae, blennorrhea, cancelleria, carpentaria, dacryorrhea, dany garcia, desmoplasia, dicranaceae, echoacousia, encrinoidea, euglenaceae, eumenorrhea, filarioidea, gabi garcia, gallinaceae, george weah, giraffoidea, glandularia, gorgoniacea, graphorrhea, guarantee a, gunvalkyrie, hydroxyurea, kombinaciya, lee zii jia, leucorrhoea, leukorrhoea, lymphorrhea, macrophilia, malamatiyya, malonylurea, marsupialia, nitrosourea, north korea, novopangaea, onomatopeia, onychogalea, otopyorrhea, ovalentaria, panathenaea, pandanaceae, pannipitiya, pantelleria, phthorimaea, phytozoaria, priapulacea, prosopopeia, pseudotinea, retrophilia, rhinorrhoea, rochalimaea, saintpaulia, santa-maria, sathyapriya, schaffneria, scopophilia, scotophilia, serpentaria, shantipriya, slavophilia, south korea, steatorrhea, succorrhoea, tauromaquia, utricularia, verbenaceae, xanthorhoea, xanthorroea

12 letters:
aimee garcia, al-ghashiyah, al-malikiyah, al-shahaniya, amphicarpaea, ascaridoidea, biastophilia, blennorrhoea, bronchorrhea, burkholderia, carbamylurea, cyclosporeae, diego-garcia, dracaenaceae, dysmenorrhea, euchambersia, galactorrhea, hydrachnidia, melanorrhoea, microbrachia, muhammadiyah, ophiurioidea, pennatulacea, penthesileia, pharmacopeia, polygonaceae, psychomachia, qalandariyya, scorpionidea, sipunculacea, steatorrhoea, stenopodidea, sulaymaniyah, sulfonylurea, tao tsuchiya, technophilia, timothy weah, vibrionaceae, xanthorrhoea, zaporizhzhia

13 letters:
aspidogastrea, balsaminaceae, brightlingsea, casuarinaceae, dysmenorrhoea, eschscholtzia, galactorrhoea, glycorrhachia, hypomenorrhea, kadesh-barnea, macroscelidea, nelumbonaceae, nerdfighteria, olfactophilia, pentatomoidea, pharmacopoeia, phenolic urea, pleurobrachia, polymenorrhea, porphyrinuria, portulacacaea, rhabdiasoidea, spectrophilia, spermatorrhea, suhrawardiyya, sulphonylurea, thrombophilia, valerianaceae, vodafone idea

14 letters:
acrotomophilia, bougainvillaea, coproporphyria, cyclophyllidea, genus galleria, gondwanatheria, hypermenorrhea, kharaharapriya, oligomenorrhea, phenylthiourea, plantaginaceae, saurobatrachia, shanmukhapriya, spermatorrhoea, tetraphyllidea

15 letters:
acephalobrachia, cryptomenorrhea, cypripedioideae, fushimi-no-miya, haruhi suzumiya, rhizopogonaceae, toyotamaphimeia

16 letters:
acephalorrhachia, actinomycetacaea, al-filistiniyyah, brachymetatarsia, ethylenethiourea, ethylnitrosourea, hippocastanaceae, history of korea, mycobacteriacaea, mycoplasmatacaea, pneumococcosuria, zaphnath-paaneah, zoomastigophorea

17 letters:
english wikipedia, himesh reshammiya, methylnitrosourea, preconceived idea, republic of korea

18 letters:
diethylmalonylurea, phytomastigophorea

19 letters:
flag of south korea

20 letters:
antonov an-225 mriya, chamath palihapitiya

22 letters:
alpha-naphthylthiourea, capital of north korea, capital of south korea, economy of south korea

27 letters:
conscription in south korea, demographics of south korea

4 letters:
area, aria

5 letters:
feria, noria, syria

6 letters:
anuria, chorea, egeria, gloria, iberia, larrea, mohria, otaria, peoria, sauria, scoria, shorea

7 letters:
algeria, armeria, arteria, assyria, bavaria, bomarea, deparia, filaria, hoheria, icteria, illyria, liberia, luxuria, malaria, nigeria, olearia, riparia, setaria, siberia, xylaria

8 letters:
alliaria, arenaria, azoturia, bacteria, bulgaria, calvaria, cercaria, cetraria, clitoria, cnidaria, criteria, dentaria, drynaria, euphoria, eutheria, fragaria, gesneria, hernaria, hysteria, micteria, oliguria, petteria, planaria, plumeria, pouteria, pretoria, pueraria, tectaria, uvularia, vaccaria, victoria, vittaria, volvaria, wistaria, wisteria

9 letters:
actinaria, alectoria, alfilaria, alfileria, alkaluria, araucaria, blattaria, bloomeria, boehmeria, cafeteria, digitaria, dioscorea, dysphoria, elettaria, habenaria, hematuria, infusoria, ketonuria, lagenaria, land area, latimeria, ligularia, lobularia, manchuria, myrciaria, myricaria, nidularia, phillyrea, pilularia, podalyria, pulicaria, pyrularia, saponaria, slum area, somateria, stellaria, subularia, urticaria, vangueria, vesicaria, viminaria

10 letters:
ablepharia, acetonuria, actiniaria, alcyonaria, ammoniuria, armillaria, aureolaria, cargo area, cortaderia, crotalaria, diphtheria, eubacteria, fistularia, fouquieria, gaultheria, holothuria, keteleeria, kiggelaria, lophosoria, matricaria, maxillaria, metatheria, micromeria, motor area, parietaria, pertusaria, radiolaria, rural area, sertularia, short aria, stropharia, urban area

11 letters:
albuminuria, alkalinuria, archosauria, arundinaria, auricularia, calceolaria, carpenteria, convallaria, cryptomeria, dining area, fritillaria, launch area, leycesteria, loiseleuria, mammillaria, nothosauria, pantotheria, picnic area, procellaria, proteinuria, prototheria, pterosauria, sanguinaria, sansevieria, scutellaria, spergularia, target area, turbellaria, vallisneria, visual area

12 letters:
alstroemeria, broca's area, burmeisteria, camping area, farming area, frontal area, genus larrea, halobacteria, ictodosauria, ketoaciduria, laguncularia, lepidosauria, loading area, madreporaria, mycobacteria, myxobacteria, parking area, pellicularia, pelycosauria, playing area, plesiosauria, scrophularia, seating area, service area, staging area, storage area, subject area, surface area, thiobacteria, tubercularia, umbellularia, waiting area

13 letters:
aminoaciduria, auditory area, cortical area, cyanobacteria, disaster area, drainage area, ichthyosauria, lake victoria, nitrobacteria, stephanomeria, sterling area, suburban area, trautvetteria, true bacteria

14 letters:
appendicularia, archaebacteria, broadcast area, enterobacteria, excitable area, phantasmagoria, slime bacteria

15 letters:
archaeobacteria, exhibition area, geographic area, nitric bacteria, nitrosobacteria, purple bacteria

16 letters:
amanita muscaria, anxiety hysteria, association area, capital of syria, gliding bacteria, nitrous bacteria, residential area, sulphur bacteria

17 letters:
geographical area, ring rot bacteria

18 letters:
capital of liberia, capital of nigeria

19 letters:
conversion hysteria, force per unit area

20 letters:
potato scab bacteria