regurgitation vs vomiting

regurgitation and vomiting both are nouns.

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

As nouns, regurgitation and vomiting are synonyms defined as:

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

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

regurgitation (noun)	vomiting (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