finally vs at long last

finally and at long last both are adverbs.

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

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

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

finally (adverb)	at long last (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