How do you say rain in Chinese?
— 下雨 (xiàyǔ), 降雨 (jiàngyǔ); 雨; 雨

Generic synonyms for rain in Chinese
fall落 (luò), 落下 (luòxià), 掉 (diào)
Specialized synonyms for rain in Chinese
spit吐痰 (tǔtán), 吐 (tǔ), 啐 (cuì), 咯 (kǎ), 噴放, 喷放 (pēnfàng), 吐口 (tǔkǒu)