tom vs domestic cat

tom and domestic cat both are nouns.

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

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

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

tom (noun)	domestic cat (noun)
male cat	any domesticated member of the genus Felis
male turkey