lash vs horsewhip

lash and horsewhip both are nouns.

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

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

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

lash (noun)	horsewhip (noun)
a quick blow delivered with a whip or whiplike object	a whip for controlling horses
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)	horsewhip (verb)
strike as if by whipping	whip with a whip intended for horses
beat severely with a whip or rod
bind with a rope, chain, or cord
lash or flick about sharply