hence vs therefore

hence and therefore both are adverbs.

Word	Noun	Adjective	Verb	Adverb
hence	No	No	No	Yes
therefore	No	No	No	Yes

As adverbs, hence and therefore are synonyms defined as:

hence and therefore: (used to introduce a logical conclusion) from that fact or reason or as a result

Other synonyms of hence include so, thence, thus.

hence (adverb)	therefore (adverb)
(used to introduce a logical conclusion) from that fact or reason or as a result	(used to introduce a logical conclusion) from that fact or reason or as a result
from this time	as a consequence
from this place