all in all vs altogether

all in all is not a noun while altogether is a noun.

Word	Noun	Adjective	Verb	Adverb
all in all	No	No	No	Yes
altogether	Yes	No	No	Yes

As adverbs, all in all and altogether are synonyms defined as:

all in all and altogether: with everything considered (and neglecting details)

Other synonyms of all in all include on the whole, tout ensemble.

all in all (noun)	altogether (noun)
	informal terms for nakedness

all in all (adverb)	altogether (adverb)
with everything considered (and neglecting details)	with everything included or counted
	with everything considered (and neglecting details)
	to a complete degree or to the full or entire extent; Completely or entirely