nevertheless vs all the same

nevertheless and all the same both are adverbs.

Word	Noun	Adjective	Verb	Adverb
nevertheless	No	No	No	Yes
all the same	No	No	No	Yes

As adverbs, nevertheless and all the same are synonyms defined as:

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

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

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