emesis vs puking

emesis and puking both are nouns.

Word	Noun	Adjective	Verb	Adverb
emesis	Yes	No	No	No
puking	Yes	No	No	No

As nouns, emesis and puking are synonyms defined as:

emesis and puking: the reflex act of ejecting the contents of the stomach through the mouth

Other synonyms of emesis include disgorgement, regurgitation, vomit, vomiting.

emesis (noun)	puking (noun)
the reflex act of ejecting the contents of the stomach through the mouth	the reflex act of ejecting the contents of the stomach through the mouth