How do you say religion in Chinese?
— 宗教 (zōngjiào); 宗教; 宗教

Examples of category for religion in Chinese
brother哥哥 (gēge), 弟弟 (dìdi), 兄弟 (xiōngdi)
clean乾淨, 干净 (gānjìng)
devil惡魔, 恶魔 (èmó), 魔鬼 (móguǐ), 邪魔, 邪魔 (xiémó), 惡鬼, 恶鬼 (èguǐ)
die骰子 (tóuzi), 色子 (shǎizi)
hell地獄, 地狱 (dìyù)
watch手錶, 手表 (shǒubiǎo)
Specialized synonyms for religion in Chinese
church教會, 教会 (jiàohuì)