romp vs girl

romp and girl both are nouns.

Word	Noun	Adjective	Verb	Adverb
romp	Yes	No	Yes	No
girl	Yes	No	No	No

As nouns, girl is a hypernym of romp; that is, girl is a word with a broader meaning than romp:

Other hypernyms of romp include fille, miss, missy, young lady, young woman.

romp (noun)	girl (noun)
gay or light-hearted recreational activity for diversion or amusement	a young female
an easy victory	a girl or young woman with whom a man is romantically involved
a girl who behaves in a boyish manner	a youthful female person
	a friendly informal reference to a grown woman
	a female human offspring