| 量子色动力学 | liàng zǐ sè dòng lì xué | quantum chromodynamics QCD, the theory of quarks in physics |
| 量子论 | liàng zǐ lùn | quantum theory (physics) |
| 量子电动力学 | liàng zǐ diàn dòng lì xué | quantum electrodynamics QED |
| 金铃子 | jīn líng zi | chinaberry (Melia azedarach) |
| 金镏子 | jīn liù zi | gold ring; CL:条 |
| 钉子户 | dīng zi hù | family who hang on in last-ditch attempt to save their house; obstructive person or household (esp. resisting eviction); strong nay-sayer; tricky character |
| 刨子 | bào zi | plane |
| 铗子 | jiā zi | tongs |
| 锔子 | jū zi | clamp for mending pottery |
| 锂离子电池 | lǐ lí zǐ diàn chí | lithium ion battery |
| 锯子 | jù zi | a saw |
| 钱串子 | qián chuàn zi | string of cash |
| 表蒙子 | biǎo méng zi | watch glass; crystal |
| 镏子 | liù zi | a (finger) ring |
| 鏊子 | ào zi | griddle |
| 铲子 | chǎn zi | shovel; spade; trowel; spatula (kitchen utensil); CL:把 |
| 铁板茄子 | tiě bǎn qié zi | iron pan eggplant (typical Northern-Chinese dish) |
| 铁格子 | tiě gé zi | iron lattice; metal grid |
| 铁蛋子 | tiě dàn zi | see 铁球 |
| 钻空子 | zuān kòng zi | lit. to drill a hole; to take advantage of a loophole; to exploit an advantage; to seize the opportunity (esp. to do sth bad) |
| 凿子 | záo zǐ | chisel |
| 长子的名份 | zhǎng zǐ de míng fèn | birthright |
| 长子县 | Cháng zǐ xiàn | Changzhi county in Changzhi 长治, Shanxi |
| 长柄勺子 | cháng bǐng sháo zi | ladle |
| 门子 | mén zi | doorman (traditional); hanger-on of an aristocrat; knack; door |
| 闭子集 | bì zǐ jí | closed subset (math) |
| 开口子 | kāi kǒu zi | a dike breaks; fig. to provide facilities (for evil deeds); to open the floodgates |
| 关子 | guān zi | climax (in a story) |
| 关门弟子 | guān mén dì zǐ | last disciple of a master |
| 阿月浑子 | ā yuè hún zi | pistachio |
| 阿月浑子实 | ā yuè hún zǐ shí | pistachio nut |
| 阿月浑子树 | ā yuè hún zǐ shù | pistachio tree |
| 阿尔法粒子 | ā ěr fǎ lì zǐ | alpha particle (helium nucleus) |
| 阵子 | zhèn zi | period of time |
| 除子 | chú zǐ | divisor (math.) |
| 阴离子部位 | yīn lí zǐ bù wèi | anionic site |
| 陈谷子烂芝麻 | chén gǔ zi làn zhī ma | lit. stale grain, overcooked sesame (idiom); fig. the same boring old gossip |
| 阳离子 | yáng lí zǐ | cation (chemistry) |
| 阳电子 | yáng diàn zǐ | positron; also called 正电子 |
| 隆子 | Lóng zǐ | Lhünzê county, Tibetan: Lhun rtse rdzong, in Lhokha prefecture 山南地区, Tibet |
| 隆子县 | Lóng zǐ xiàn | Lhünzê county, Tibetan: Lhun rtse rdzong, in Lhokha prefecture 山南地区, Tibet |
| 隐君子 | yǐn jūn zi | recluse; hermit; used for homophone 瘾君子, opium addict |
| 雀子 | qiāo zi | a freckle; lentigo |
| 雄配子 | xióng pèi zǐ | male gamete; sperm cell |
| 双城子 | Shuāng chéng zi | Shuangchengzi, former name of Ussuriisk city in Russian Pacific Primorsky region |
| 双子 | Shuāng zǐ | Gemini (star sign) |
| 双子座 | Shuāng zǐ zuò | Gemini (constellation and sign of the zodiac) |
| 双子叶 | shuāng zǐ yè | dicotyledon (plant family distinguished by two embryonic leaves, includes daisies, broadleaved trees, herbaceous plants) |
| 双台子 | Shuāng tái zi | Shuangtai district of Panjin city 盘锦市, Liaoning |
| 双台子区 | Shuāng tái zi qū | Shuangtai district of Panjin city 盘锦市, Liaoning |
