homosexual vs homo

homosexual and homo both are nouns.

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

As nouns, homosexual and homo are synonyms defined as:

homosexual and homo: someone who is sexually attracted to persons of the same sex

Other synonyms of homosexual include gay, homophile.

homosexual (noun)	homo (noun)
someone who is sexually attracted to persons of the same sex	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

homosexual (adjective)	homo (adjective)
sexually attracted to members of your own sex