majority vs legal age

majority and legal age both are nouns.

Word	Noun	Adjective	Verb	Adverb
majority	Yes	No	No	No
legal age	Yes	No	No	No

As nouns, majority and legal age are synonyms defined as:

majority and legal age: the age at which persons are considered competent to manage their own affairs

majority (noun)	legal age (noun)
the property resulting from being or relating to the greater in number of two parts; the main part	the age at which persons are considered competent to manage their own affairs
(elections) more than half of the votes
the age at which persons are considered competent to manage their own affairs