mousse vs hair mousse

mousse and hair mousse both are nouns.

Word	Noun	Adjective	Verb	Adverb
mousse	Yes	No	Yes	No
hair mousse	Yes	No	No	No

As nouns, mousse and hair mousse are synonyms defined as:

mousse and hair mousse: toiletry consisting of an aerosol foam used in hair styling

mousse (noun)	hair mousse (noun)
toiletry consisting of an aerosol foam used in hair styling	toiletry consisting of an aerosol foam used in hair styling
a light creamy dish made from fish or meat and set with gelatin
a rich, frothy, creamy dessert made with whipped egg whites and heavy cream

mousse (verb)	hair mousse (verb)
apply a styling gel to