unlash vs lash

unlash is not a noun while lash is a noun.

Word	Noun	Adjective	Verb	Adverb
unlash	No	No	Yes	No
lash	Yes	No	Yes	No

unlash (noun)	lash (noun)
	a quick blow delivered with a whip or whiplike object
	leather strip that forms the flexible part of a whip
	any of the short curved hairs that grow from the edges of the eyelids

unlash (verb)	lash (verb)
untie the lashing of	strike as if by whipping
	beat severely with a whip or rod
	bind with a rope, chain, or cord
	lash or flick about sharply