hair mousse vs mousse

hair mousse and mousse both are nouns.

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

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

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

hair mousse (noun)	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

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