fart vs unconditioned reflex

fart and unconditioned reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
fart	Yes	No	Yes	No
unconditioned reflex	Yes	No	No	No

As nouns, unconditioned reflex is a hypernym of fart; that is, unconditioned reflex is a word with a broader meaning than fart:

fart: a reflex that expels intestinal gas through the anus
unconditioned reflex: an automatic instinctive unlearned reaction to a stimulus

fart (noun)	unconditioned reflex (noun)
a reflex that expels intestinal gas through the anus	an automatic instinctive unlearned reaction to a stimulus

fart (verb)	unconditioned reflex (verb)
expel intestinal gases through the anus