female genitals vs puss

female genitals and puss both are nouns.

Word	Noun	Adjective	Verb	Adverb
female genitals	Yes	No	No	No
puss	Yes	No	No	No

As nouns, puss is a hyponym of female genitals; that is, puss is a word with a more specific, narrower meaning than female genitals:

Other hyponyms of female genitals include minge, cunt, pussy, slit, snatch, twat, vulva.

female genitals (noun)	puss (noun)
external female sex organs	informal terms referring to a domestic cat
	obscene terms for female genitals