adulthood vs majority

adulthood and majority both are nouns.

Word	Noun	Adjective	Verb	Adverb
adulthood	Yes	No	No	No
majority	Yes	No	No	No

adulthood (noun)	majority (noun)
the state (and responsibilities) of a person who has attained maturity	the property resulting from being or relating to the greater in number of two parts; the main part
the period of time in your life after your physical growth has stopped and you are fully developed	(elections) more than half of the votes
	the age at which persons are considered competent to manage their own affairs