hotdog vs wiener

hotdog and wiener both are nouns.

Word	Noun	Adjective	Verb	Adverb
hotdog	Yes	No	No	No
wiener	Yes	No	No	No

As nouns, hotdog and wiener are synonyms defined as:

hotdog and wiener: a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll

Other synonyms of hotdog include dog, frank, frankfurter, hot dog, weenie, wienerwurst.

hotdog (noun)	wiener (noun)
a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll	a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
a frankfurter served hot on a bun
someone who performs dangerous stunts to attract attention to himself