act reflexively vs fart

act reflexively is not a noun while fart is a noun.

Word	Noun	Adjective	Verb	Adverb
act reflexively	No	No	Yes	No
fart	Yes	No	Yes	No

As verbs, fart is a hyponym of act reflexively; that is, fart is a word with a more specific, narrower meaning than act reflexively:

Other hyponyms of act reflexively include sneeze, blink, nictate, nictitate, wink, break wind, salivate.

act reflexively (noun)	fart (noun)
	a reflex that expels intestinal gas through the anus

act reflexively (verb)	fart (verb)
act in an uncontrolled manner	expel intestinal gases through the anus