Here's what rhymes with fastish.
Words that almost rhyme with fastish
contrastive vanish hashish flattish faddish famish haggish parish anguish lavish banish catfish radish vanquish mannish flatfish raffish snappish waggish kaddish caddish palish laddish establish blackish brackish languish clannish brandish blandish outlandish reestablish disestablish