lesbian vs homo

lesbian and homo both are nouns.

Word	Noun	Adjective	Verb	Adverb
lesbian	Yes	Yes	No	No
homo	Yes	No	No	No

As nouns, homo is a hypernym of lesbian; that is, homo is a word with a broader meaning than lesbian:

Other hypernyms of lesbian include gay, homophile, homosexual, adult female, woman.

lesbian (noun)	homo (noun)
a female homosexual	any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage
	someone who is sexually attracted to persons of the same sex

lesbian (adjective)	homo (adjective)
of or relating to or characterized by homosexual relations between woman