- 同盟军 tóngméngjūn allied forcesarmies that have joined in an alliance
- 同盟会 tóngménghuì TongmenghuiA revolutionary alliance founded by Sun Yat-sen in Tokyo in 1905 to overthrow the Qing Dynasty; it was the predecessor of the [[国民党|國民黨|guo2 min2 dang3]].
- 同盟国 tóngméngguó allied nationAn ally or country that has joined a treaty or alliance; a confederation
- 攻守同盟 gōngshǒutóngméng offensive and defensive allianceAn alliance between nations to provide mutual military assistance in both attacking and defending; a mutual defense pact.
- 同盟者 tóngméngzhě ally; confederateA person who has joined a league or alliance; a close associate or fellow member of a confederacy
- 神圣同盟 shénshèngtóngméng Holy AllianceThe alliance formed in 1815 by the monarchs of Russia, Prussia, and Austria to maintain the European monarchical order and suppress revolutionary movements.
- 中国同盟会 zhōngguótóngménghuì Tongmenghuithe United League of China, Sun Yat-sen's revolutionary alliance for democracy founded in 1905 and predecessor to the Kuomintang
- 台湾民主自治同盟 táiwānmínzhǔzìzhìtóngméng Taiwan Democratic Self-Government LeagueTaiwan Democratic Self-Government League; one of the eight legally recognized political parties in the People's Republic of China, founded in 1947
- 关税同盟 guānshuìtóngméng customs unionA group of countries that have agreed to eliminate tariffs between them and apply a common external tariff to other countries.
- 中国民主同盟 zhōngguómínzhǔtóngméng China Democratic LeagueChina Democratic League; one of the eight legally recognized political parties in China
- 汉萨同盟 hànsàtóngméng Hanseatic Leaguethe commercial and defensive confederation of merchant guilds and market towns in Northwestern and Central Europe from the Late Middle Ages