burping vs unconditioned reflex

burping and unconditioned reflex both are nouns.

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

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

burping: a reflex that expels gas noisily from the stomach through the mouth
unconditioned reflex: an automatic instinctive unlearned reaction to a stimulus

burping (noun)	unconditioned reflex (noun)
a reflex that expels gas noisily from the stomach through the mouth	an automatic instinctive unlearned reaction to a stimulus