| rash | Displaying or proceeding from a lack of careful consideration of the possible consequences of an action | |
| raucous | Making a disturbingly harsh and loud noise | |
| raze | Completely destroy a building, town, or other site. | |
| readily | Without hesitation or reluctance; willingly | |
| reap | To cut and gather (a crop or harvest) | |
| rebuttal | A refutation or contradiction | |
| recalcitrant | Having an obstinately uncooperative attitude toward authority or discipline | |
| recant | To formally withdraw or renounce one's formerly held belief, opinion, or statement | |
| recapitulated | To summarize or state again the main points of | |
| recidivist | A convicted criminal who reoffends, especially repeatedly | |