pretty vs jolly

pretty is not a noun while jolly is a noun.

Word	Noun	Adjective	Verb	Adverb
pretty	No	Yes	No	Yes
jolly	Yes	Yes	Yes	Yes

As adverbs, pretty and jolly are synonyms defined as:

Other synonyms of pretty include fairly, middling, moderately, passably, reasonably, somewhat.

pretty (noun)	jolly (noun)
	a yawl used by a ship's sailors for general work
	a happy party

pretty (adjective)	jolly (adjective)
(used ironically) unexpectedly bad	full of or showing high-spirited merriment
pleasing by delicacy or grace; not imposing

pretty (verb)	jolly (verb)
	be silly or tease one another

pretty (adverb)	jolly (adverb)
to certain extent or degree	to certain extent or degree