black pudding vs blood sausage

black pudding and blood sausage both are nouns.

Word	Noun	Adjective	Verb	Adverb
black pudding	Yes	No	No	No
blood sausage	Yes	No	No	No

As nouns, black pudding and blood sausage are synonyms defined as:

black pudding and blood sausage: a black sausage containing pig's blood and other ingredients

Other synonyms of black pudding include blood pudding.

black pudding (noun)	blood sausage (noun)
a black sausage containing pig's blood and other ingredients	a black sausage containing pig's blood and other ingredients