Here's what rhymes with mainlandborn.
born borne torn barn darn porn tarn corn worn horn warn yarn adorn morn mourn thorn shorn lorn scorn sworn unborn reborn outworn forborne unworn lowborn forlorn firstborn stillborn unicorn waterborne peppercorn timeworn careworn forewarn lovelorn sweetcorn forsworn foresworn Words that almost rhyme with mainlandborn
charm dorm form farm warm harm storm norm forme perform alarm psalm swarm disarm deform rearm underarm reform uniform inform conform transform forearm firearm nonfarm outperform preform vermiform yardarm overarm rewarm lukewarm thunderstorm nonuniform multiform chloroform cuneiform fusiform cruciform schoolmarm misinform don dawn bon pawn bonne john upon non drawn gone von con lawn yon hon wan baton fawn han schon spawn yawn khan sawn sonne vpon brawn prawn faun gnawn swan yuan npon operon begone pecan tenon amazon antiphon predawn autobahn outdrawn undergone thereon salon pantheon whereon exon fagon redrawn chaperon chiffon hereupon aileron hereon mastodon lasagne neocon emoticon methadon withdrawn thereupon whereupon polygon automaton denouement foregone positron echelon marathon octagon paragon forgone overdrawn pentagon epsilon tarragon woebegone leprechaun heptagon trimaran upsilon frogspawn phenomenon lexicon rapprochement carillon cordovan hexagon pantechnicon