puss vs domestic cat

puss and domestic cat both are nouns.

Word	Noun	Adjective	Verb	Adverb
puss	Yes	No	No	No
domestic cat	Yes	No	No	No

As nouns, domestic cat is a hypernym of puss; that is, domestic cat is a word with a broader meaning than puss:

Other hypernyms of puss include Felis catus, Felis domesticus, house cat.

puss (noun)	domestic cat (noun)
informal terms referring to a domestic cat	any domesticated member of the genus Felis
obscene terms for female genitals