civil death vs attainder

civil death and attainder both are nouns.

Word	Noun	Adjective	Verb	Adverb
civil death	Yes	No	No	No
attainder	Yes	No	No	No

As nouns, civil death and attainder are synonyms defined as:

civil death (noun)	attainder (noun)
cancellation of civil rights	cancellation of civil rights
the legal status of a person who is alive but who has been deprived of the rights and privileges of a citizen or a member of society; the legal status of one sentenced to life imprisonment