come-on vs attractiveness

come-on and attractiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
come-on	Yes	No	No	No
attractiveness	Yes	No	No	No

As nouns, attractiveness is a hypernym of come-on; that is, attractiveness is a word with a broader meaning than come-on:

come-on: qualities that attract by seeming to promise some kind of reward
attractiveness: the quality of arousing interest; being attractive or something that attracts

Other hypernyms of come-on include attraction.

come-on (noun)	attractiveness (noun)
qualities that attract by seeming to promise some kind of reward	sexual allure
anything that serves as an enticement	the quality of arousing interest; being attractive or something that attracts