terrifically vs wondrous

terrifically is not an adjective while wondrous is an adjective.

Word	Noun	Adjective	Verb	Adverb
terrifically	No	No	No	Yes
wondrous	No	Yes	No	Yes

As adverbs, terrifically and wondrous are synonyms defined as:

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

terrifically (adjective)	wondrous (adjective)
	extraordinarily good or great; used especially as intensifiers

terrifically (adverb)	wondrous (adverb)
(used as an intensifier) excellently	(used as an intensifier) excellently