trounce vs lash

trounce is not a noun while lash is a noun.

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

As verbs, trounce and lash are synonyms defined as:

Other synonyms of trounce include flog, lather, slash, strap, welt, whip.

trounce (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

trounce (verb)	lash (verb)
censure severely or angrily	strike as if by whipping
come out better in a competition, race, or conflict	beat severely with a whip or rod
beat severely with a whip or rod	bind with a rope, chain, or cord
	lash or flick about sharply