notwithstanding vs withal

notwithstanding and withal both are adverbs.

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

As adverbs, notwithstanding and withal are synonyms defined as:

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

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

notwithstanding (adverb)	withal (adverb)
despite anything to the contrary (usually preceding a concession)	together with this
	despite anything to the contrary (usually preceding a concession)