Here's what rhymes with riff.
if cliff def whiff tiff stiff sniff skiff midriff hieroglyph Words that almost rhyme with riff
is writhed rive writhe his this with give fish wish miss myth viz bis dish kiss bliss dis sieve diss hiss pith sis pis piss scythe biz hes kith whiz fizz shes abyss amiss quiz smith outlive relive remiss swish forgive therewith wherewith herewith premiss dismiss forthwith monolith jellyfish reminisce chandeliers cuttlefish silversmith corroborative lymph nymph