| A | B |
| Raze | to scrape, cut, or shave off, demolish |
| Recalcitrant | difficult to manage or operate, resistant |
| Recant | to withdraw or repudiate, renounce |
| Reciprocate | to give and take mutually |
| Recrimination | a retaliatory accusation |
| Redundant | exceeding what is necessary or normal |
| Relent | to become less severe, harsh, or strict usually from reasons of humanity |
| Reminiscence | recall to mind of a long-forgotten experience or fact |
| Remorse | a gnawing distress arising from a sense of guilt for past wrongs, self reproach |
| Renegade | a deserter from one faith, cause, or allegiance to another |
| Repercussion | an action or effect given or exerted in return |
| Replenish | to supply fully, to fill with inspiration or power |
| Reprisal | the act or practice in international law of resorting to force short of war in retaliation for damage or loss suffered |
| Rescind | to take away, remove |
| Resilient | capable of withstanding shock without permanent deformation or rupture |