horsewhip vs lather

horsewhip and lather both are nouns.

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

As verbs, lather is a hypernym of horsewhip; that is, lather is a word with a broader meaning than horsewhip:

Other hypernyms of horsewhip include flog, lash, slash, strap, trounce, welt, whip.

horsewhip (noun)	lather (noun)
a whip for controlling horses	the froth produced by soaps or detergents
	the foam resulting from excessive sweating (as on a horse)
	a workman who puts up laths
	agitation resulting from active worry

horsewhip (verb)	lather (verb)
whip with a whip intended for horses	rub soap all over, usually with the purpose of cleaning
	exude sweat or lather
	form a lather
	beat severely with a whip or rod