altogether vs all in all

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

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

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

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

Other synonyms of altogether include on the whole, tout ensemble.

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

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