age norm vs norm

age norm and norm both are nouns.

Word	Noun	Adjective	Verb	Adverb
age norm	Yes	No	No	No
norm	Yes	No	No	No

As nouns, norm is a hypernym of age norm; that is, norm is a word with a broader meaning than age norm:

age norm: the average age at which particular performances are expected to appear
norm: a statistic describing the location of a distribution

Other hypernyms of age norm include average.

age norm (noun)	norm (noun)
the average age at which particular performances are expected to appear	a statistic describing the location of a distribution
	a standard or model or pattern regarded as typical