offing vs hereafter

offing and hereafter both are nouns.

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

As nouns, hereafter is a hypernym of offing; that is, hereafter is a word with a broader meaning than offing:

Other hypernyms of offing include future, futurity, time to come.

offing (noun)	hereafter (noun)
the part of the sea that can be seen from the shore and is beyond the anchoring area	the time yet to come
the near or foreseeable future	life after death

offing (adverb)	hereafter (adverb)
	in a subsequent part of this document or statement or matter etc.
	following this in time or order or place; after this
	in a future life or state