haircare vs shampoo

haircare and shampoo both are nouns.

Word	Noun	Adjective	Verb	Adverb
haircare	Yes	No	No	No
shampoo	Yes	No	Yes	No

As nouns, shampoo is a hyponym of haircare; that is, shampoo is a word with a more specific, narrower meaning than haircare:

haircare: care for the hair: the activity of washing or cutting or curling or arranging the hair
shampoo: the act of washing your hair with shampoo

Other hyponyms of haircare include brush, brushing, comb, combing, hairweaving.

haircare (noun)	shampoo (noun)
care for the hair: the activity of washing or cutting or curling or arranging the hair	the act of washing your hair with shampoo
	cleansing agent consisting of soaps or detergents used for washing the hair

haircare (verb)	shampoo (verb)
	use shampoo on (hair)