floodplain

abstain, again, air lane, airplane, amain, arcane, arraign, attain, Bahrain, Bassein, Beltane, biplane, birdbrain, block plane, bloodstain, boat train, brain drain, bugbane, campaign, champagne, champaign, Champlain, checkrein, chicane, chilblain, choke chain, chow mein, cinquain, cocaine, Cockaigne, Coltrane, coxswain, complain, constrain, contain, cordwain, cowbane, crackbrain, demesne, deplane, destain, detain, detrain, devein, disdain, distain, distrain, dogbane, domain, drivetrain, dumb cane, edge-grain, Elaine, enchain, enplane, entrain, ethane, explain, eyestrain, fast lane, fleabane, floatplane, food chain, forebrain, Fort Wayne, Gawain, germane, Great Dane, grosgrain, half plane, henbane, hindbrain, house-train, humane, Hussein, Igraine, immane, inane, ingrain, insane, jack plane, lamebrain, left brain, lightplane, lo mein, long-chain, Lorraine, maintain, marchpane, membrane, methane, midbrain, migraine, Montaigne, montane, moraine, mortmain, Moulmein, mundane, neck-rein, New Spain, obtain, octane, ordain, pertain, plain-Jane, profane, propane, ptomaine, purslane, quatrain, raise Cain, refrain, remain, restrain, retain, retrain, right brain, romaine, sailplane, sea-lane, seaplane, seatrain, split-brain, sustain, tailplane, tearstain, terrane, Touraine, towplane, triplane, Ukraine, unchain, urbane, vervain, vicereine, villein, volplane, warplane, wave train, wolfsbane