- 钻牛角尖 zuānniújiǎojiān persist futilelyto stubbornly focus on an insoluble problem or get caught in a dead-end way of thinking
- 牛角挂书 niújiǎoguàshū studiousnessto be extremely diligent in one's studies, making use of every spare moment to read and learn
- 钻牛角 zuānniújiǎo overthinkingto waste time on an insoluble or insignificant problem, or to get stuck in a dead end by over-analyzing trivial details
- 牛角椒 niújiǎojiāo cayenne pepperA variety of long, tapered chili pepper resembling a cow's horn, typically used for its mild to moderate heat.
- 牛角包 niújiǎobāo croissant
- 牛角面包 niújiǎomiànbāo croissant