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