child molester vs pederast

child molester and pederast both are nouns.

Word	Noun	Adjective	Verb	Adverb
child molester	Yes	No	No	No
pederast	Yes	No	No	No

As nouns, child molester and pederast are synonyms defined as:

child molester and pederast: a man who has sex (usually sodomy) with a boy as the passive partner

Other synonyms of child molester include paederast.

child molester (noun)	pederast (noun)
a man who has sex (usually sodomy) with a boy as the passive partner	a man who has sex (usually sodomy) with a boy as the passive partner