stage name vs anonym

stage name and anonym both are nouns.

Word	Noun	Adjective	Verb	Adverb
stage name	Yes	No	No	No
anonym	Yes	No	No	No

As nouns, anonym is a hypernym of stage name; that is, anonym is a word with a broader meaning than stage name:

stage name: the pseudonym of an actor
anonym: a fictitious name used when the person performs a particular social role

Other hypernyms of stage name include nom de guerre, pseudonym.

stage name (noun)	anonym (noun)
the pseudonym of an actor	a fictitious name used when the person performs a particular social role