shampoo vs cleaner

shampoo and cleaner both are nouns.

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

As nouns, cleaner is a hypernym of shampoo; that is, cleaner is a word with a broader meaning than shampoo:

shampoo: cleansing agent consisting of soaps or detergents used for washing the hair
cleaner: a preparation used in cleaning something

Other hypernyms of shampoo include cleanser, cleansing agent.

shampoo (noun)	cleaner (noun)
the act of washing your hair with shampoo	a preparation used in cleaning something
cleansing agent consisting of soaps or detergents used for washing the hair	someone whose occupation is cleaning
	the operator of dry-cleaning establishment

shampoo (verb)	cleaner (verb)
use shampoo on (hair)