altogether vs in all

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

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

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

Other synonyms of altogether include all told.

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

altogether (adverb)	in all (adverb)
with everything included or counted	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