at last vs at long last

at last and at long last both are adverbs.

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

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

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

at last (adverb)	at long last (adverb)
as the end result of a succession or process	as the end result of a succession or process