| 同时 | tóng shí | at the same time; simultaneously |
| 同志 | tóng zhì | comrade; homosexual (slang); CL:个 |
| 同 | tóng | like; same; similar; together; alike; with |
| 同样 | tóng yàng | same; equal; equivalent |
| 同一 | tóng yī | identical; the same |
| 同意 | tóng yì | to agree; to consent; to approve |
| 同学 | tóng xué | to study at the same school; fellow student; classmate; CL:位,个 |
| 同盟会 | Tóng méng huì | Tongmenghui, Sun Yat-sen's alliance for democracy, founded 1905, became the Guomindang 国民党 in 1912 |
| 同情 | tóng qíng | compassion; relent; sympathize; sympathy |
| 同胞 | tóng bāo | born of the same parents; sibling; fellow citizen; compatriot |
| 同上 | tóng shàng | as above; ditto; idem |
| 同期 | tóng qī | the corresponding time period (e.g. compare inflation now with the rate during the same month last year) |
| 同年 | tóng nián | the same year |
| 同盟 | tóng méng | alliance |
| 同类 | tóng lèi | similar; same type; alike |
| 同等 | tóng děng | equal to; having the same social class or status |
| 同心 | tóng xīn | with common wishes; spirit of cooperation; concentric; Tongxin county in Wuzhong 吴忠, Ningxia |
| 同行 | tóng háng | person of the same profession; of the same trade, occupation or industry |
| 同治 | Tóng zhì | reign name of Qing emperor (1861-1875) |
| 同行 | tóng xíng | journey together |
| 同性 | tóng xìng | same nature; homosexual |
| 同步 | tóng bù | synchronous; to synchronize; to keep step with |
| 同伴 | tóng bàn | companion; comrade; fellow |
| 同位素 | tóng wèi sù | isotope |
| 同人 | tóng rén | colleagues; fellowship (among people) |
| 同事 | tóng shì | colleague; co-worker; CL:个,位 |
| 同化 | tóng huà | assimilation (cultural, digestive, phonemic etc) |
| 同轴电缆 | tóng zhóu diàn lǎn | coaxial cable |
| 同乡 | tóng xiāng | person from the same village, town, or province |
| 同居 | tóng jū | to live together |
| 同心同德 | tóng xīn tóng dé | of one mind (idiom) |
| 同源 | tóng yuán | homology (biology); a common origin |
| 同伙 | tóng huǒ | colleague; co-conspirator; accomplice |
| 同心协力 | tóng xīn xié lì | to work with a common purpose (idiom); to make concerted efforts; to pull together; to work as one |
| 同化作用 | tóng huà zuò yòng | assimilation; anabolism (biology); constructive metabolism (using energy to make proteins etc) |
| 同工同酬 | tóng gōng tóng chóu | equal pay for equal work |
| 同知 | tóng zhī | government sub-prefect (old) |
| 同仁 | tóng rén | variant of 同人; Tongren county in Huangnan Tibetan autonomous prefecture 黄南藏族自治州, Qinghai |
| 同甘共苦 | tóng gān gòng kǔ | shared delights and common hardships (idiom); to share life's joys and sorrows; for better or for worse |
| 同辈 | tóng bèi | peer |
| 同业公会 | tóng yè gōng huì | trade association |
| 同素异形体 | tóng sù yì xíng tǐ | allotropy |
| 同谋 | tóng móu | to conspire with sb; to plot; a conspirator; a partner in crime; an accomplice |
| 同盟国 | tóng méng guó | allied nation; ally; confederation |
| 同僚 | tóng liáo | colleague; fellow-worker |
| 同感 | tóng gǎn | similar feeling; fellow felling; sympathy; understanding; consensus |
| 同道 | tóng dào | same principle |
| 同屋 | tóng wū | roommate; CL:个 |
同一个世界，
同一个梦想 | tóng yī gè shì jiè ,
tóng yī gè mèng xiǎng | One world - one dream, motto of 2008 Beijing Olympic games |
| 同仁堂 | Tóng Rén Táng | Tong Ren Tang |
