lather vs fizz

lather and fizz both are nouns.

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

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

Other hypernyms of lather include effervesce, foam, form bubbles, froth, sparkle.

lather (noun)	fizz (noun)
the froth produced by soaps or detergents	an effervescent beverage (usually alcoholic)
the foam resulting from excessive sweating (as on a horse)
a workman who puts up laths
agitation resulting from active worry

lather (verb)	fizz (verb)
rub soap all over, usually with the purpose of cleaning	become bubbly or frothy or foaming
exude sweat or lather
form a lather
beat severely with a whip or rod