ribbing vs harassment

ribbing and harassment both are nouns.

Word	Noun	Adjective	Verb	Adverb
ribbing	Yes	No	No	No
harassment	Yes	No	No	No

As nouns, harassment is a hypernym of ribbing; that is, harassment is a word with a broader meaning than ribbing:

ribbing: the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances
harassment: the act of tormenting by continued persistent attacks and criticism

Other hypernyms of ribbing include molestation.

ribbing (noun)	harassment (noun)
the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances	the act of tormenting by continued persistent attacks and criticism
a framework of ribs	a feeling of intense annoyance caused by being tormented