riffle vs riff

riffle and riff both are nouns.

Word	Noun	Adjective	Verb	Adverb
riffle	Yes	No	Yes	No
riff	Yes	No	Yes	No

As verbs, riffle and riff are synonyms defined as:

Other synonyms of riffle include flick, flip, leaf, thumb.

riffle (noun)	riff (noun)
shuffling by splitting the pack and interweaving the two halves at their corners	a jazz ostinato; usually provides a background for a solo improvisation
a small wave on the surface of a liquid

riffle (verb)	riff (verb)
shuffle (playing cards) by separating the deck into two parts and riffling with the thumbs so the cards intermix	play riffs
twitch or flutter	look through a book or other written material
stir up (water) so as to form ripples
look through a book or other written material