puking vs unconditioned reflex

puking and unconditioned reflex both are nouns.

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

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

puking: the reflex act of ejecting the contents of the stomach through the mouth
unconditioned reflex: an automatic instinctive unlearned reaction to a stimulus

puking (noun)	unconditioned reflex (noun)
the reflex act of ejecting the contents of the stomach through the mouth	an automatic instinctive unlearned reaction to a stimulus