childhood vs girlhood

childhood and girlhood both are nouns.

Word	Noun	Adjective	Verb	Adverb
childhood	Yes	No	No	No
girlhood	Yes	No	No	No

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

Other hyponyms of childhood include maidenhood, maidhood, boyhood.

childhood (noun)	girlhood (noun)
the state of a child between infancy and adolescence	the childhood of a girl
the time of person's life when they are a child