notwithstanding vs nevertheless

notwithstanding and nevertheless both are adverbs.

Word	Noun	Adjective	Verb	Adverb
notwithstanding	No	No	No	Yes
nevertheless	No	No	No	Yes

As adverbs, notwithstanding and nevertheless are synonyms defined as:

notwithstanding and nevertheless: despite anything to the contrary (usually preceding a concession)

Other synonyms of notwithstanding include all the same, at the same time, even so, however, nonetheless, still, withal, yet.

notwithstanding (adverb)	nevertheless (adverb)
despite anything to the contrary (usually preceding a concession)	despite anything to the contrary (usually preceding a concession)