How do you say swim in Chinese?
— 游泳 (yóuyǒng)

Generic synonyms for swim in Chinese
be是 (shì)
go去 (qù)
travel旅行 (lǚxíng), 旅游 (lǚyóu)
Specialized synonyms for swim in Chinese
school學校, 学校 (xuéxiào)