plainly vs manifestly

plainly and manifestly both are adverbs.

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

As adverbs, plainly and manifestly are synonyms defined as:

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

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

plainly (adverb)	manifestly (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