5 letters:
aynes, bains, banes, cains, canes, dains, danes, fains, fanes, gains, ganes, hains, hanes, jains, janes, kainz, kanes, lains, lanes, mains, mainz, manes, pains, panes, rains, ranes, reins, sains, sainz, tains, vanes, veins, wains, wanes, yanes

6 letters:
agains, bain's, baines, baynes, blains, blanes, brains, branes, cain's, caines, chains, chenes, cranes, daines, dane's, deigns, drains, feigns, fein's, gaines, grains, haines, haynes, jane's, jaynes, kane's, keynes, lane's, llanes, maines, maynes, nhanes, phanes, plains, planes, raines, raynes, reigns, reines, skains, skeins, stains, swains, thanes, trains, trainz, twains, waynes

7 letters:
akranes, alkanes, attains, batanes, boranes, brain's, butanes, camenes, chain's, chains', crain's, crane's, detains, domains, douanes, graines, leganes, maine's, mcmains, obtains, ordains, pavanes, plaines, plane's, planes', regains, retains, romains, silanes, spain's, sprains, staines, strains, taxanes, tisanes, train's, twain's, vileyns, wayne's

8 letters:
abstains, arraigns, bahrains, betaines, biplanes, bugbanes, cabranes, caifanes, calpains, chicanes, cobain's, cocaines, contains, cowbanes, cremains, deplanes, detrains, disdains, dogbanes, elaine's, enchains, enplanes, entrains, estranes, explains, henbanes, heptanes, hernanes, ingrains, jordaens, jordanes, mccain's, mclean's, moraines, outgains, pentanes, pertains, profanes, prytanes, refrains, retrains, sarbanes, scalenes, soutanes, sustains, terrains, terranes, tigranes, tziganes, vervains, villeins

9 letters:
all-mains, arellanes, bahrain's, campaigns, catenanes, codomains, complains, coxswains, distrains, fleabanes, germain's, hurricane, hussein's, in chains, jetbrains, maclean's, maintains, membranes, midbrains, migraines, neuvaines, paravanes, pregnanes, purslanes, quatrains, quintains, restrains, rowaine's, seaplanes, suzerains, tahapanes, triplanes, ukraine's, urethanes, warplanes

10 letters:
aeroplanes, afterpains, appertains, aquaplanes, ascertains, baisemains, birdbrains, campaign's, carboranes, champagnes, champaigns, constrains, duquesne's, entertains, forebrains, grosgrains, gyroplanes, hindbrains, hippomanes, hurricanes, konecranes, lamebrains, magallanes, messiaen's, monoplanes, overtrains, preordains, sailplanes, take pains, theophanes, wolfsbanes, xenophanes, zatarain's

11 letters:
aron baynes, be at pains, bloodstains, catanduanes, chatelaines, chevrotains, cholestanes, elecampanes, floatplanes, floodplains, foreordains, hurricane's, hydroplanes, kallikreins, labor pains, lumberjanes, musicbrainz, overstrains, powertrains, santillanes, scotoplanes, snow chains, souterrains, tire chains, trichomanes, windowpanes

12 letters:
balletomanes, carlos sainz, counterpanes, cycloalkanes, great plains, labour pains, nicolaitanes, phosphoranes, roman reigns, rowdy gaines, simpleplanes, weathervanes

13 letters:
aix-les-bains, colton haynes, counterstains, cyclopropanes, demimondaines, guinea grains, polyurethanes, scatterbrains, ultramontanes

15 letters:
alice in chains, digne-les-bains, evian-les-bains, trihalomethanes

16 letters:
thonon-les-bains

17 letters:
yverdon-les-bains

19 letters:
john maynard keynes

21 letters:
arromanches-les-bains, buckminsterfullerenes

27 letters:
boeing commercial airplanes

4 letters:
ames, aims

5 letters:
games, james, names

6 letters:
frames, claims, flames, blames, game's, name's

8 letters:
st james

11 letters:
henry james, saint james

13 letters:
olympic games, william james

14 letters:
olympian games

15 letters:
theory of games

20 letters:
winter olympic games