Spew up is a commonly used phrase that refers to the act of vomiting or throwing up. However, there are several synonyms that can be used to replace this phrase such as vomit, regurgitate, puke, hurl, retch, belch up, heave, discharge, toss cookies, barf, upchuck, and turn stomach. These synonyms can be used interchangeably in different contexts, and may help to add variety and nuance to descriptions of this unpleasant bodily function. Some alternatives may be more effective in more formal contexts, while others may be more appropriate in informal or colloquial settings.