moderately vs pretty

moderately is not an adjective while pretty is an adjective.

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

As adverbs, moderately and pretty are synonyms defined as:

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

moderately (adjective)	pretty (adjective)
	(used ironically) unexpectedly bad
	pleasing by delicacy or grace; not imposing

moderately (adverb)	pretty (adverb)
to certain extent or degree	to certain extent or degree
with moderation; in a moderate manner