Words That Rhyme With "Brainer" :

2 syllables:

awner, banner, Beaner, Binner, boner, Bonner, caner, canework, canner, chainwork, changer, claimer, cleaner, coiner, conner, Connor, cooner, Craner, Cranor, cunner, damer, danger, daymark, deaner, deener, denner, diener, diner, dinner, Donar, Doner, donner, donor, downer, drainer, Einar, fainter, fawner, finer, finner, flamer, gainer, gainor, gamer, gleaner, goner, Gunnar, gunner, honer, honor, honour, inner, Jenner, joiner, keener, Kenner, Kiner, Kinner, lamer, lanner, leaner, liner, loaner, loner, lunar, maimer, Mainer, Maner, manger, manner, manor, Maynard, meaner, meanor, minar, mineer, miner, minor, moaner, namer, niner, oner, owner, painter, pawnor, penner, phoner, piner, pinner, plainer, planar, planer, planner, punner, Queener, rainer, saner, scanner, schooner, seiner, Shinar, shiner, signer, Siner, sinner, Sinor, skinner, sonar, sooner, spanner, spawner, spinner, spooner, stainer, Steiner, stoner, strainer, stunner, Swaner, Swanner, tainter, Tamar, tamer, tanner, Tener, tenner, tenor, thenar, thinner, Tiner, tinner, toner, tonner, towner, trainer, trainor, tuner, twiner, viner, waner, wanner, waymark, weaner, weiner, whiner, wiener, Winer, winner, yawner

3 syllables:

abstainer, arranger, attainder, attainture, beginner, Berliner, calciner, campaigner, cislunar, complainer, consigner, consignor, container, convener, coplanar, decliner, defamer, demeanor, demeanour, designer, detainer, disclaimer, dishonor, dishonour, diviner, endanger, exchanger, fourteener, harpooner, lacunar, lampooner, maintainer, maintainor, maligner, nonplanar, O'connor, ordainer, postponer, reclaimer, recliner, refiner, remainder, restrainer, retainer, sublunar, sustainer, topliner, translunar

4 syllables:

Afrikaner, carabiner, circumlunar, entertainer, interlunar, intervenor, Lipizzaner, Lippizaner, magaziner, misdemeanor, misdemeanour, Pasadena, semilunar, submariner, uniplanar