obviously vs plainly

obviously and plainly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
obviously	No	No	No	Yes
plainly	No	No	No	Yes

As adverbs, obviously and plainly are synonyms defined as:

obviously and plainly: unmistakably (`plain' is often used informally for `plainly')

Other synonyms of obviously include apparently, evidently, manifestly, patently, plain.

obviously (adverb)	plainly (adverb)
unmistakably (`plain' is often used informally for `plainly')	unmistakably (`plain' is often used informally for `plainly')
	in a simple manner; without extravagance or embellishment