There are various synonyms for the phrase "throw (sth) up." Some of them include vomit, puke, regurgitate, hurl, heave, retch, upchuck, spew, and disgorged. These words all refer to the act of expelling the contents of the stomach through the mouth. The use of such synonyms is particularly common in medical and informal settings, where people tend to be more descriptive and straightforward about bodily functions. It is important to note that some of these words may be considered vulgar or impolite, and should be used with caution in formal settings or around sensitive individuals.