obviously vs manifestly

obviously and manifestly both are adverbs.

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

As adverbs, obviously and manifestly are synonyms defined as:

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

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

obviously (adverb)	manifestly (adverb)
unmistakably (`plain' is often used informally for `plainly')	unmistakably (`plain' is often used informally for `plainly')