ribbing vs rib

ribbing and rib both are nouns.

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

ribbing (noun)	rib (noun)
the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances	support resembling the rib of an animal
a framework of ribs	a projecting molding on the underside of a vault or ceiling; may be ornamental or structural
	any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)
	a riblike supporting or strengthening part of an animal or plant
	a teasing remark
	cut of meat including one or more ribs

ribbing (verb)	rib (verb)
	subject to laughter or ridicule
	form vertical ribs by knitting