homo vs closet queen

homo and closet queen both are nouns.

Word	Noun	Adjective	Verb	Adverb
homo	Yes	No	No	No
closet queen	Yes	No	No	No

As nouns, closet queen is a hyponym of homo; that is, closet queen is a word with a more specific, narrower meaning than homo:

homo: someone who is sexually attracted to persons of the same sex
closet queen: a negative term for a homosexual man who chooses not to reveal his sexual orientation

homo (noun)	closet queen (noun)
any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage	a negative term for a homosexual man who chooses not to reveal his sexual orientation
someone who is sexually attracted to persons of the same sex