reasonably vs passably

reasonably and passably both are adverbs.

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

As adverbs, reasonably and passably are synonyms defined as:

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

reasonably (adverb)	passably (adverb)
to certain extent or degree	to certain extent or degree
with good sense or in a reasonable or intelligent manner