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