hereafter vs tomorrow

hereafter and tomorrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
hereafter	Yes	No	No	Yes
tomorrow	Yes	No	No	Yes

As nouns, tomorrow is a hyponym of hereafter; that is, tomorrow is a word with a more specific, narrower meaning than hereafter:

Other hyponyms of hereafter include kingdom come, by-and-by, offing, manana.

hereafter (noun)	tomorrow (noun)
the time yet to come	the near future
life after death	the day after today

hereafter (adverb)	tomorrow (adverb)
in a subsequent part of this document or statement or matter etc.	the next day, the day after, following the present day
following this in time or order or place; after this
in a future life or state