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