wet nurse vs nanny

wet nurse and nanny both are nouns.

Word	Noun	Adjective	Verb	Adverb
wet nurse	Yes	No	No	No
nanny	Yes	No	No	No

As nouns, nanny is a hypernym of wet nurse; that is, nanny is a word with a broader meaning than wet nurse:

Other hypernyms of wet nurse include nurse, nursemaid.

wet nurse (noun)	nanny (noun)
a woman hired to suckle a child of someone else	female goat
	a woman who is the custodian of children