froth vs shaving foam

froth and shaving foam both are nouns.

Word	Noun	Adjective	Verb	Adverb
froth	Yes	No	Yes	No
shaving foam	Yes	No	No	No

As nouns, shaving foam is a hyponym of froth; that is, shaving foam is a word with a more specific, narrower meaning than froth:

froth: a mass of small bubbles formed in or on a liquid
shaving foam: toiletry consisting of a liquid preparation containing many small bubbles that soften the beard before shaving

Other hyponyms of froth include head, lather, lather, soapsuds, suds, spume, white water, whitewater.

froth (noun)	shaving foam (noun)
a mass of small bubbles formed in or on a liquid	toiletry consisting of a liquid preparation containing many small bubbles that soften the beard before shaving

froth (verb)	shaving foam (verb)
exude or expel foam
become bubbly or frothy or foaming
make froth or foam and become bubbly