| term | pronunciation | English |
|---|
| 約束 | やくそく | arrangement; promise; appointment |
| 予約 | よやく | reservation, booking |
| 契約 | けいやく | contract, compact, agreement |
| 婚約 | こんやく | engagement, betrothal |
| 節約 | せつやく | economising, saving |
| 約 | やく | approximately, about, some |
| 一粒子既約 | いちりゅうしきやく | one particle irreducible (physics) |
| 信託契約 | しんたくけいやく | trust agreement |
| 倹約 | けんやく | thrift, economy, frugality |
| 倹約家 | けんやくか | thrifty person, economist |
| 公約 | こうやく | public commitment or promise |
| 制約 | せいやく | limitation, restriction, condition, constraints |
| 制約伝搬 | せいやくでんぱん | constraint propagation |
| 双務契約 | そうむけいやく | bilateral agreement |
| 同盟条約 | どうめいじょうやく | treaty of alliance |
| 契約書 | けいやくしょ | (written) contract |
| 契約期間 | けいやくきかん | contract period |
| 婚約者 | こんやくしゃ | fiance, fiancee |
| 条約 | じょうやく | treaty, pact |
| 盟約 | めいやく | oath, pledge, pact, covenant |
| 約束手形 | やくそくてがた | promissory note |
| 約款 | やっかん | agreement, stipulation, article, clause |
| 締約 | ていやく | conclusion of a treaty |
| 規約 | きやく | agreement, rules, code, protocol, convention |
| 解約 | かいやく | cancellation of contract |
| 誓約 | せいやく | written vow, pledge, covenant |
| 誓約書 | せいやくしょ | written oath, covenant |