Princeton's WordNet

1. vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up(verb)

   eject the contents of the stomach through the mouth

   "After drinking too much, the students vomited"; "He purged continuously"; "The patient regurgitated the food we gave him last night"