puking vs emesis

puking and emesis both are nouns.

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

As nouns, puking and emesis are synonyms defined as:

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

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

puking (noun)	emesis (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