pederasty vs gayness

pederasty and gayness both are nouns.

Word	Noun	Adjective	Verb	Adverb
pederasty	Yes	No	No	No
gayness	Yes	No	No	No

As nouns, gayness is a hypernym of pederasty; that is, gayness is a word with a broader meaning than pederasty:

pederasty: sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner)
gayness: a sexual attraction to (or sexual relations with) persons of the same sex

Other hypernyms of pederasty include paraphilia, homoeroticism, homosexualism, homosexuality, queerness.

pederasty (noun)	gayness (noun)
sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner)	a sexual attraction to (or sexual relations with) persons of the same sex