Chinese words pronounced cáo (2nd tone) cao in any tone, all 13 words 6 words. 曹(cáo) class or grade 槽(cáo) trough 漕(cáo) to transport (esp. grain) by water 嘈(cáo) bustling 艚(cáo) seagoing junk 蓸(cáo) (a kind of herb)