wonderfully vs marvellously

wonderfully and marvellously both are adverbs.

Word	Noun	Adjective	Verb	Adverb
wonderfully	No	No	No	Yes
marvellously	No	No	No	Yes

As adverbs, wonderfully and marvellously are synonyms defined as:

Other synonyms of wonderfully include marvelously, superbly, terrifically, toppingly, wondrous, wondrously.

wonderfully (adverb)	marvellously (adverb)
(used as an intensifier) excellently	(used as an intensifier) excellently