at last vs finally

at last and finally both are adverbs.

Word	Noun	Adjective	Verb	Adverb
at last	No	No	No	Yes
finally	No	No	No	Yes

As adverbs, at last and finally are synonyms defined as:

Other synonyms of at last include at long last, in the end, ultimately.

at last (adverb)	finally (adverb)
as the end result of a succession or process	as the end result of a succession or process
	after an unspecified period of time or an especially long delay
	the item at the end