adulthood vs manhood

adulthood and manhood both are nouns.

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

As nouns, manhood is a hyponym of adulthood; that is, manhood is a word with a more specific, narrower meaning than adulthood:

adulthood: the state (and responsibilities) of a person who has attained maturity
manhood: the state of being a man; manly qualities

Other hyponyms of adulthood include parentage, parenthood, muliebrity, womanhood.

adulthood (noun)	manhood (noun)
the state (and responsibilities) of a person who has attained maturity	the status of being a man
the period of time in your life after your physical growth has stopped and you are fully developed	the quality of being human
	the state of being a man; manly qualities