form bubbles vs lather

form bubbles is not a noun while lather is a noun.

Word	Noun	Adjective	Verb	Adverb
form bubbles	No	No	Yes	No
lather	Yes	No	Yes	No

As verbs, lather is a hyponym of form bubbles; that is, lather is a word with a more specific, narrower meaning than form bubbles:

Other hyponyms of form bubbles include seethe.

form bubbles (noun)	lather (noun)
	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

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