costal cartilage vs rib

costal cartilage and rib both are nouns.

Word	Noun	Adjective	Verb	Adverb
costal cartilage	Yes	No	No	No
rib	Yes	No	Yes	No

costal cartilage (noun)	rib (noun)
the cartilages that connect the sternum and the ends of the ribs; its elasticity allows the chest to move in respiration	support resembling the rib of an animal
	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

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