| 1 | 理论 | 理論 | lǐ lùn | li3 lun4 | theory; Classifiers: 个 ; to argue; to take notice of | | |
| 2 | 讨论 | 討論 | tǎo lùn | tao3 lun4 | to discuss; to talk over; Classifiers: 个 | | |
| 3 | 无论 | 無論 | wú lùn | wu2 lun4 | no matter what or how; regardless of whether... | | |
| 4 | 结论 | 結論 | jié lùn | jie2 lun4 | conclusion; verdict; Classifiers: 个 ; to conclude; to reach a verdict | | |
| 5 | 论 | 論 | lùn | lun4 | opinion; view; theory; doctrine; to discuss; to talk about; to regard; to consider; per; by the (kilometer, hour etc) | | |
| 6 | 不论 | 不論 | bù lùn | bu4 lun4 | whatever; no matter what (who, how etc); regardless of; not to discuss | | |
| 7 | 议论 | 議論 | yì lùn | yi4 lun4 | to comment; to talk about; to discuss; discussion; Classifiers: 个 | | |
| 8 | 论述 | 論述 | lùn shù | lun4 shu4 | treatise; discourse; exposition | | |
| 9 | 论文 | 論文 | lùn wén | lun4 wen2 | paper; treatise; thesis; Classifiers: 篇 ; to discuss a paper or thesis (old) | | |
| 10 | 争论 | 爭論 | zhēng lùn | zheng1 lun4 | to argue; to debate; to contend; argument; contention; controversy; debate; Classifiers: 次 | | |
| 11 | 评论 | 評論 | píng lùn | ping2 lun4 | to comment on; to discuss; comment; commentary; Classifiers: 篇 | | |
| 12 | 论证 | 論證 | lùn zhèng | lun4 zheng4 | to prove a point; to expound on; to demonstrate or prove (through argument); proof | | |
| 13 | 理论上 | 理論上 | lǐ lùn shàng | li3 lun4 shang4 | in theory; theoretically | | |
| 14 | 舆论 | 輿論 | yú lùn | yu2 lun4 | public opinion | | |
| 15 | 认识论 | 認識論 | rèn shi lùn | ren4 shi5 lun4 | epistemology (in philosophy, the theory of how we know things) | | |
| 16 | 无论如何 | 無論如何 | wú lùn rú hé | wu2 lun4 ru2 he2 | whatever the case; in any event; no matter what; by all possible means | | |
| 17 | 方法论 | 方法論 | fāng fǎ lùn | fang1 fa3 lun4 | methodology; Discours de la méthode by René Descartes 笛卡儿 , 1637 | | |
| 18 | 谈论 | 談論 | tán lùn | tan2 lun4 | to discuss; to talk about | | |
| 19 | 相对论 | 相對論 | xiāng duì lùn | xiang1 dui4 lun4 | theory of relativity | | |
| 20 | 言论 | 言論 | yán lùn | yan2 lun4 | expression of opinion; views; remarks; arguments | | |
| 21 | 论点 | 論點 | lùn diǎn | lun4 dian3 | argument; line of reasoning; thesis; point (of discussion) | | |
| 22 | 唯物论 | 唯物論 | wéi wù lùn | wei2 wu4 lun4 | the philosophy of materialism, doctrine that physical matter is the whole of reality | | |
| 23 | 进化论 | 進化論 | jìn huà lùn | jin4 hua4 lun4 | Darwin's theory of evolution | | |
| 24 | 辩论 | 辯論 | biàn lùn | bian4 lun4 | debate; argument; to argue over; Classifiers: 场 | | |
| 25 | 理论家 | 理論家 | lǐ lùn jiā | li3 lun4 jia1 | theorist; theoretician | | |