Vienna sausage vs frankfurter

Vienna sausage and frankfurter both are nouns.

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

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

Vienna sausage: short slender frankfurter usually with ends cut off
frankfurter: 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, hot dog, hotdog, weenie, wiener, wienerwurst.

Vienna sausage (noun)	frankfurter (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