chili dog vs hot dog

chili dog and hot dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
chili dog	Yes	No	No	No
hot dog	Yes	No	No	No

As nouns, hot dog is a hypernym of chili dog; that is, hot dog is a word with a broader meaning than chili dog:

Other hypernyms of chili dog include hotdog, red hot.

chili dog (noun)	hot dog (noun)
a hotdog with chili con carne on it	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