5 letters:
beans, biens, cines, deans, deens, denes, eanes, genes, henes, jeans, keens, leans, leins, lenes, liens, lienz, means, menes, miens, nenes, peans, peens, peins, penes, saenz, seans, teens, tiens, viens, weans, weens, weins, wiens, yeans

6 letters:
amines, arenes, azines, bean's, brenes, brienz, chines, cleans, dean's, deanes, deines, gene's, gleans, greens, jean's, jeanes, kean's, means', preens, queans, queens, scenes, sheens, skeens, skenes, steens, stiens, tweens, usines

7 letters:
a-teens, achenes, alkenes, athenes, atliens, bereans, bylines, camoens, careens, caseins, comines, cosines, demeans, e-zines, ermines, eumenes, gamines, green's, greens', indenes, irene's, lateens, lupines, marines, mcmeans, murines, orpines, patines, purines, queen's, rabin's, ravines, refenes, repines, sabines, salines, sateens, screens, sheen's, spleens, tajines, tureens, undines, unseens, xylenes

8 letters:
appleans, arameans, arlene's, azulenes, beelines, betweens, bogbeans, burdines, canteens, cardines, cheane's, citrines, colleens, commines, convenes, cortines, cremeens, cuisines, dasheens, diamines, engines', estrenes, fanzines, fifteens, filene's, flamines, gradines, greene's, hellenes, isolines, lamine's, latrines, levine's, longines, lorean's, machines, marine's, marines', martines, mclean's, mulleins, nankeens, netbeans, olivines, opalines, origenes, pennines, preteens, proteins, routines, s.e.n.s., sabine's, sardines, sixteens, slovenes, soybeans, styrenes, tontines, totsiens, vaccines, vitrines

9 letters:
achimenes, acridines, aeschines, alcamenes, allogenes, apennines, assideans, belizeans, bien aise, buckbeans, burdine's, calgene's, carotenes, cleomenes, culicines, d'alene's, dextrines, ecardines, effizienz, eighteens, emachines, eritreans, ethylenes, figurines, fluorenes, foramines, fourteens, francines, gadarenes, gasolines, machine's, machines', magazines, magdalens, nazarenes, nineteens, picolines, polygenes, pre-teens, protein's, pyrazines, pyridines, rathmines, sixteen's, sosigenes, sosthenes, squireens, stilbenes, telchines, teredines, theatines, thiazines, thirteens, trephines, triazines, vaccine's, walgreens

10 letters:
acetylenes, achaemenes, alkadienes, almandines, anaximenes, argentines, atlanteans, augustines, benzidines, butadienes, caesareans, calcimines, calixtines, celestines, crinolines, damascenes, dessalines, eighteen's, evergreens, francine's, fullerenes, gabardines, gaberdines, gargareans, gergesenes, grenadines, guanidines, halloweens, hanselines, hermogenes, hippomenes, histamines, histidines, intervenes, jellybeans, kathleen's, levantines, libertines, limousines, listerines, magazine's, magazines', mamertines, mascarenes, mezzanines, monoamines, muscadines, nectarines, nemerteans, nicotine's, passerines, peregrines, phenazines, phosphenes, prolamines, protogenes, pteridines, reconvenes, replevines, secundines, seventeens, submarines, sunscreens, supervenes, tangerines, telmarines, testudines, theramenes, thirteen's, toluidines, velveteens, vertigines, vitarine's, wolverines

11 letters:
alcaligenes, androstenes, anthracenes, antisthenes, aquamarines, aristomenes, asphaltenes, bernstein's, brigantines, by no means, christine's, cleisthenes, contravenes, delawareans, demosthenes, dickstein's, feinstein's, feldstein's, florentines, ghibellines, go-betweens, goldstein's, guillotines, josephine's, mangosteens, megasthenes, microgreens, mondegreens, paramarines, philippines, philistines, phillipines, prometheans, pyrimidines, quarantines, silkscreens, smithereens, submarine's, subroutines, tambourines, tourmalines, trampolines, travertines, tryptamines, weinstein's, windscreens, wolverine's

12 letters:
amphetamines, balanchine's, baltimoreans, benzylamines, bridgettines, by all means, by any means, callisthenes, constantines, duberstein's, eratosthenes, fluoresceins, glucosamines, incarnadines, langoustines, leukotrienes, mangaloreans, man of means, nanomachines, naphthacenes, naphthalenes, nitrosamines, nitrosomines, philippines', salad greens, smokescreens, ultramarines, wintergreens

13 letters:
ethanolamines, finkelstein's, hammerstein's, hypoxanthines, newsmagazines, pantestudines, phenanthrenes, polyethylenes, polyisoprenes, springsteen's, testicardines, turnip greens

14 letters:
androstadienes, catecholamines, chlorobenzenes, collard greens, frankenstein's, galactosamines, hydroxylamines, mustard greens, oleomargarines, phenothiazines, polymethylenes, pork and beans

15 letters:
afro-argentines, big city greens, methylxanthines, phenethylamines, proto-oncogenes

16 letters:
chop-suey greens, cyclohexylamines, methamphetamines

17 letters:
behind-the-scenes, dihydroxybenzenes

18 letters:
boston baked beans, the king of queens

19 letters:
by artificial means

23 letters:
flag of the philippines

26 letters:
capital of the philippines, regions of the philippines

27 letters:
republic of the philippines

28 letters:
languages of the philippines

29 letters:
awkwafina is nora from queens