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