leather vs lather

leather and lather both are nouns.

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

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

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

leather (noun)	lather (noun)
an animal skin made smooth and flexible by removing the hair and then tanning	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

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