capsaicin vs chemical irritant

capsaicin and chemical irritant both are nouns.

Word	Noun	Adjective	Verb	Adverb
capsaicin	Yes	No	No	No
chemical irritant	Yes	No	No	No

As nouns, chemical irritant is a hypernym of capsaicin; that is, chemical irritant is a word with a broader meaning than capsaicin:

capsaicin: colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno
chemical irritant: a substance producing irritation

capsaicin (noun)	chemical irritant (noun)
colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno	a substance producing irritation