flirt vs romp

flirt and romp both are nouns.

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

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

Other hypernyms of flirt include caper, frolic, gambol, play.

flirt (noun)	romp (noun)
playful behavior intended to arouse sexual interest	gay or light-hearted recreational activity for diversion or amusement
a seductive woman who uses her sex appeal to exploit men	an easy victory
	a girl who behaves in a boyish manner

flirt (verb)	romp (verb)
talk or behave amorously, without serious intentions	win easily
behave carelessly or indifferently	play boisterously
	run easily and fairly fast