Here's what rhymes with undergrowth.
growth loath wroth both quoth sloth troth Words that almost rhyme with undergrowth
close rose gross grows rows grove clothe loaf crows glows clove loathe lows rove underclothes roes those shows goes knows dose nose arose chose drove flows prose blows pose throws toes foes hose nos froze pros woes cove slows throes wove doze gauche hoes hos hove sows throve trove noes tows beaus sloes oppose stove disclose repose strove undergoes diagnose enclose snows bedclothes inclose morose engross jocose nightclothes outgrows brioche stows suppose impose propose dispose expose ratios compose adipose bestows interpose radios bungalows depose folios foreclose overflows overthrows patios verbose cameos plainclothes rodeos behove buboes buffalos foregoes forgoes interwove salvoes adios foreknows vireos embryos grandiose studios decompose overdose bellicose comatose transpose varicose dominoes viscose lachrymose scarecrows stereos dominos pantyhose reimpose superpose cellulose presuppose juxtapose politicos superimpose discompose mustachios pistachios recompose moustachios portfolios predispose manifestoes archipelagoes nitrocellulose