blood sausage vs black pudding

blood sausage and black pudding both are nouns.

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

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

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

Other synonyms of blood sausage include blood pudding.

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