teasing vs romp

teasing and romp both are nouns.

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

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

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

teasing (noun)	romp (noun)
the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances	gay or light-hearted recreational activity for diversion or amusement
playful vexation	an easy victory
the act of removing tangles from you hair with a comb	a girl who behaves in a boyish manner

teasing (adjective)	romp (adjective)
causing irritation or annoyance
playfully vexing (especially by ridicule)
arousing sexual desire without intending to satisfy it