regurgitation vs puking

regurgitation and puking both are nouns.

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

As nouns, regurgitation and puking are synonyms defined as:

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

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

regurgitation (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
recall after rote memorization
backflow of blood through a defective heart valve