moderately vs passably

moderately and passably both are adverbs.

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

As adverbs, moderately and passably are synonyms defined as:

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

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