| Term | Definition |
| praise, approval, applause, approbation | syn. acclaim |
| claim | 聲稱 |
| proclaim | 宣告 |
| declaim | 慷慨陳詞 |
| reclaim | 要求收回 |
| disclaim | 否認 |
| exclaim | 驚叫 |
| accustom, inure, adjust, acclimate | syn. acclimatize |
| acclaim, praise, approval | syn. accolade |
| hold, adapt, adjust | syn. accommodate |
| skillful | syn. accomplished |
| accomplish | accomplished → vt. |
| correspond, give | syn. accord |
| cord | 繩子 |
| record | 記錄 |
| discord | 不和 |
| concord | 調和 |
| pact | 協定 |
| contract | 契約1 |
| treaty | 條約 |
| compact | 協議 |
| agreement | 合同 |
| covenant | 契約2 |
| convention | 公約 |
| correspondingly, therefore | syn. accordingly |
| authorize | syn. accredit |
| accumulate | syn. accrue |
| amass, build up | syn. accumulate |
| accuse | accusation → vt. |
| acid | acidic → n. |
| acid | acidic → adj. |
| tart | syn. acidulous |
| zenith, pinnacle, peak, apex | syn. acme |
| nadir | ant. acme |
| acquiescence | acquiesce → n. |
| acquiescent | acquiesce → adj. |
| acquire | acquisition → vt. |
| acquisitive | acquisition → adj. |
| absolve, exonerate | syn. acquit |
| acquittal | acquit → n. |
| choking, pungent, caustic | syn. acrid |
| bitter, rancorous | syn. acrimonious |
| acrimony | acrimonious → n. |