Here's what rhymes with placoderm.
term germ terme berm perm firm affirm sperm worm therm confirm corm infirm reaffirm isotherm squirm reconfirm wheatgerm endosperm gymnosperm angiosperm Words that almost rhyme with placoderm
turn burn adjourn tern churn learn stern fern yearn spurn upturn return concern discern overturn quern nocturne sauterne taciturn unconcern subaltern