extremely vs exceedingly

extremely and exceedingly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
extremely	No	No	No	Yes
exceedingly	No	No	No	Yes

As adverbs, extremely and exceedingly are synonyms defined as:

Other synonyms of extremely include deathly, super.

extremely (adverb)	exceedingly (adverb)
to an extreme degree	to an extreme degree
to a high degree or extent; favorably or with much respect