- 西南部 xīnánbù southwestsouthwest part
- 东西南北 dōngxīnánběi cardinal directionseast, west, south, and north; the four cardinal directions
- 黔西南布依族苗族自治州 Qiánxīnán Bùyīzú Miáozú Zìzhìzhōu Qianxinan PrefectureQianxinan Buyei and Miao Autonomous Prefecture in Guizhou Province
- 西南亚 xīnányà Southwest Asiasouthwest Asia
- 西南交通大学 Xīnán Jiāotōng Dàxué Southwest Jiaotong University
- 西南大学 Xīnán Dàxué Southwest UniversitySouthwest University (Chongqing)
- 西南官话 xīnánguānhuà Southwestern MandarinSouthwestern Mandarin, a dialect group of Mandarin spoken primarily in southwestern China
- 西南栗耳凤鹛 xīnánlì'ěrfèngméi striated yuhina(bird species of China) striated yuhina (Yuhina castaniceps)
- 国立西南联合大学 Guólì Xīnán Liánhé Dàxué Southwest Associated UniversityNational Southwest Associated University, formed by Peking, Tsinghua and Nankai Universities in Kunming during 1937-1945
- 西南中沙群岛 Xīnánzhōngshā Qúndǎo Xinanzhongsha IslandsXinanzhongsha islands, Hainan
- 向西南 xiàngxīnán southwestward
- 西南冠纹柳莺 xīnánguānwénliǔyīng Blyth's leaf warbler(bird species of China) Blyth's leaf warbler (Phylloscopus reguloides)