Vienna sausage vs wienerwurst

Vienna sausage and wienerwurst both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vienna sausage	Yes	No	No	No
wienerwurst	Yes	No	No	No

As nouns, wienerwurst is a hypernym of Vienna sausage; that is, wienerwurst is a word with a broader meaning than Vienna sausage:

Vienna sausage: short slender frankfurter usually with ends cut off
wienerwurst: a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll

Other hypernyms of Vienna sausage include dog, frank, frankfurter, hot dog, hotdog, weenie, wiener.

Vienna sausage (noun)	wienerwurst (noun)
short slender frankfurter usually with ends cut off	a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll