in the main vs in general

in the main and in general both are adverbs.

Word	Noun	Adjective	Verb	Adverb
in the main	No	No	No	Yes
in general	No	No	No	Yes

As adverbs, in the main and in general are synonyms defined as:

Other synonyms of in the main include generally.

in the main (adverb)	in general (adverb)
without distinction of one from others	without distinction of one from others
for the most part