heretofore vs hitherto

heretofore and hitherto both are adverbs.

Word	Noun	Adjective	Verb	Adverb
heretofore	No	No	No	Yes
hitherto	No	No	No	Yes

As adverbs, heretofore and hitherto are synonyms defined as:

heretofore and hitherto: used in negative statement to describe a situation that has existed up to this point or up to the present time

Other synonyms of heretofore include as yet, so far, thus far, til now, until now, up to now, yet.

heretofore (adverb)	hitherto (adverb)
used in negative statement to describe a situation that has existed up to this point or up to the present time	used in negative statement to describe a situation that has existed up to this point or up to the present time