firm affirm therm term germ sperm worm reaffirm terme berm perm confirm infirm isotherm squirm corm reconfirm endosperm gymnosperm wheatgerm angiosperm

Words that almost rhyme with extrafirm

fern turn learn burn stern adjourn tern yearn churn spurn return concern discern quern upturn sauterne overturn nocturne subaltern taciturn unconcern