lash vs leather

lash and leather both are nouns.

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

As verbs, leather is a hyponym of lash; that is, leather is a word with a more specific, narrower meaning than lash:

Other hyponyms of lash include flagellate, scourge, horsewhip, switch, cowhide, cat, birch.

lash (noun)	leather (noun)
a quick blow delivered with a whip or whiplike object	an animal skin made smooth and flexible by removing the hair and then tanning
leather strip that forms the flexible part of a whip
any of the short curved hairs that grow from the edges of the eyelids

lash (verb)	leather (verb)
strike as if by whipping	whip with a leather strap
beat severely with a whip or rod
bind with a rope, chain, or cord
lash or flick about sharply