4 letters:
aris, cece, gees, luis, nice, rhys, seis, tese, yeas

5 letters:
adris, alise, bbc's, buice, ccsse, cease, ceris, cimss, dease, deess, deice, deise, delis, dvb-s, edris, elise, geese, giese, grece, haese, idris, kiess, lease, leece, leese, leise, liess, maese, meece, meese, meise, neace, neece, neice, neiss, niece, niess, obese, paese, peace, pease, peece, peice, piece, prece, prese, quice, rease, reece, reese, reise, riess, seise, siess, trece, tunis, unece, weise, wiess, zeese

6 letters:
a244-s, alease, ameise, andris, apiece, assise, audris, balise, bleise, breece, canice, capece, cerise, cirice, cleese, comece, crease, cuisse, d-nice, denice, denise, eglise, falise, felice, fleece, freise, friess, grease, greece, griess, hadise, indris, invece, kneece, kniess, lollis, maryse, merise, miesse, molise, narcis, neisse, patese, perdis, pieris, police, preace, preece, priess, raptis, ravi's, speece, suisse, treece, valise

7 letters:
a-reece, abreise, altadis, bernice, bojnice, caprice, cherise, clarice, cottise, decease, devries, dualise, ebonise, fabrice, janiece, jeanice, katrice, laicise, latrice, lucrece, markese, maurice, mcneece, mcneese, mcneice, odorise, opalise, ozonise, patrice, pilates, release, sarkese, schiess, shenice, unpeace, vanness

8 letters:
allweiss, amatrice, annelise, at peace, bedpiece, begrease, berenice, brocious, buslease, calidris, caponise, capparis, charisse, chojnice, clarisse, codpiece, decrease, degrease, dimerise, dispeace, disseise, divinise, encrease, equalise, etherise, eyepiece, focalise, g-police, increase, irianese, lectrice, legalese, localise, macneice, mccleese, nasalise, notarise, odourise, ogc nice, paganise, patinise, ptyalise, re-lease, seapiece, siennese, sublease, surcease, synthese, toepiece, toppiece, totalise, vaporise, viennese, vitalise, vocalise, vowelise

9 letters:
ahlspiess, animalise, antithese, aviatrice, backpiece, bailpiece, brutalise, cannulise, carbonise, carburise, chambless, colourise, dentalise, deodorise, dieselise, formalise, fur-piece, gertrudis, gilcrease, globalise, gospelise, handpiece, hardiesse, headpiece, heelpiece, hustopece, isomerise, kaolinise, kikladhes, kilcrease, kneepiece, lendlease, linearise, lyonnesse, marmalise, martyrise, mercerise, motherese, navarrese, neckpiece, normalise, nosepiece, one-piece, pauperise, picturise, podsolise, powderise, racialise, rerelease, ritualise, rundreise, set-piece, set piece, sexualise, showpiece, sidepiece, sorcerise, spanpiece, sparpiece, stabilise, starpeace, summarise, summerise, syntheses, tailpiece, timepiece, two-piece, vantrease, vantreese, vectorise, volubilis, vorspeise, vulgarise, workpiece

10 letters:
afterpiece, altarpiece, back-piece, bestialise, bowdlerise, broadpiece, burglarise, cantatrice, caramelise, centralise, channelise, cheekpiece, chesspiece, cockatrice, crosspiece, crownpiece, crystalise, decimalise, defeminise, driftpiece, effeminise, evangelise, federalise, fellatrice, felo-de-se, fieldpiece, fricatrice, generalise, grandniece, grangerise, greenpeace, illegalise, initialise, keratinise, knee piece, lend-lease, liberalise, literalise, lyophilise, make-peace, make peace, medicalise, mongrelise, mouthpiece, neutralise, palatalise, predecease, prerelease, re-release, reincrease, reserveese, ridgepiece, sangiovese, sensualise, severalise, shankpiece, slenderise, solubilise, specialise, sulphurise, surinamese, thermalise, underlease, valrelease, vietnamese

11 letters:
after-piece, altar-piece, ambergrease, ambergreece, cannibalise, catheterise, centerpiece, centrepiece, chess piece, decarbonise, decarburise, decolourise, desexualise, discolorise, exteriorise, galliardise, great-niece, hair grease, hospitalise, infantilise, interiorise, iridophores, mantelpiece, mantlepiece, masterpeace, masterpiece, officialise, peloponnese, permeablise, photophores, pre-release, regionalise, renormalise, stringpiece, subvocalise, three-piece, wool grease

12 letters:
by the piece, calculatrice, centre-piece, chimneypiece, contemporise, copolymerise, demineralise, denaturalise, depolymerise, desulphurise, discolourise, elbow grease, endonuclease, frontispiece, goose grease, insolubilise, matthew rhys, melanophores, municipalise, period piece, potentialise, remineralise, ribonuclease, segmentalise, slow-release, spiritualise, tax-increase, time-release, universalise, work-release, xanthophores

13 letters:
archaeoindris, chimney-piece, commercialise, contextualise, disasterpeace, golden fleece, governmentese, kiss of peace, monumentalise, occidentalise, peripheralise, petrosynthese, photosynthese, pipe of peace, press release, secret police, timed-release, transistorise

14 letters:
electrophorese, overspecialise, sentimentalise

15 letters:
improvvisatrice, indo-surinamese, intellectualise, military police, professionalise

16 letters:
compartmentalise, unsubstantialise

17 letters:
capital of greece, deoxyribonuclease, kingdom of greece

18 letters:
conversation piece, george i of greece

19 letters:
bourg-saint-maurice, breach of the peace

20 letters:
justice of the peace

24 letters:
constantine ii of greece, disturbance of the peace

25 letters:
list of islands of greece

29 letters:
royal canadian mounted police

4 letters:
eats

5 letters:
seats, beats, heats, meets

6 letters:
sheets, elites, treats

7 letters:
streets, defeats, repeats

8 letters:
receipts, street's

11 letters:
hamamelites

12 letters:
tiered seats