vomit vs regurgitation

vomit and regurgitation both are nouns.

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

As nouns, vomit and regurgitation are synonyms defined as:

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

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

vomit (noun)	regurgitation (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
a medicine that induces nausea and vomiting	recall after rote memorization
the matter ejected in vomiting	backflow of blood through a defective heart valve

vomit (verb)	regurgitation (verb)
eject the contents of the stomach through the mouth