rib vs jest at

rib is a noun but jest at is not a noun.

Word	Noun	Adjective	Verb	Adverb
rib	Yes	No	Yes	No
jest at	No	No	Yes	No

As verbs, rib and jest at are synonyms defined as:

Other synonyms of rib include blackguard, guy, laugh at, make fun, poke fun, ridicule, roast.

rib (noun)	jest at (noun)
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

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