| raise | rise, raise, arise | 動 | 上がる |
| rank | row, line, file, rank | 名 | 行列 |
| rank | position, rank | 名 | 階級 |
| rank | position, status, rank | 名 | 地位 |
| rapid | early, fast, quick, rapid | 形 | はやい |
| rapidly | quickly, rapidly, speedily, briskly | 副 | 速く |
| rare | rare, infrequent, uncommon, unusual | 形 | 珍しい |
| rarely | barely, hardly, rarely, scarcely | 副 | ほとんど～ない |
| rarely | rarely, not often, occasionally, seldom他 | 副 | めったに～しない |
| rash | careless, thoughtless, hasty, rash | 形 | 軽率な |
| rather | pretty, quite, fairly, rather | 副 | かなり |
| reach | arrive at, get to, reach | 動 | 到着する |
| reaction | reaction, response | 名 | 反応 |
| real | true, real, actual, genuine | 形 | 本物の |
| realize | know, learn, realize, understand | 動 | 知る |
| realize | realize, recognize, notice | 動 | 気づく |
| really | actually, really | 副 | 本当に |
| reap | harvest, reap | 動 | 収穫する |
| reason | cause, reason | 名 | 原因 |
| reasonably | quite,fairly,pretty,reasonably,mode.. | 副 | かなりの |
| recall | remember, remind, recall, recollect | 動 | 思い出す |
| receive | accept, receive, get, take | 動 | 受け取る |
| recent | fresh, new, recent | 形 | 新しい |
| recently | these days, recently, lately | 副 | 最近 |
| receptionist | clerk, worker, secretary, receptionist | 名 | 事務員 |
| recession | depression, recession, slump, 他 | 名 | 不景気 |
| recognize | realize, recognize, notice | 動 | 気づく |
| recollect | remember, remind, recall, recollect | 動 | 思い出す |
| recommend | recommend, advocate | 動 | 薦める |
| recover | recover, get well, be cured, heal | 動 | 治る |
| recruit | employ, hire, recruit | 動 | 雇う |
| reduce | reduce, decrease | 動 | 減らす |
| referee | umpire, referee, judge | 名 | 審判 |
| refuse | refuse, reject, decline | 動 | 断る |
| regard | think, consider, regard | 動 | 考える |
| region | area, region, district | 名 | 地区 |
| regulation | rule, regulation, law, act | 名 | 規則 |
| rehearse | practice, rehearse, train | 動 | 練習する |
| reject | refuse, reject, decline | 動 | 断る |
| relation | relation, relationship, tie | 名 | 関係 |
| relationship | relation, relationship, tie | 名 | 関係 |
| reliance | trust, confidence, reliance | 名 | 信頼 |
| relieve | ease, soften, relieve, soothe | 動 | 和らげる |
| relieve | lower, relieve, weaken | 動 | 小さくする |
| religion | belief, faith, religion | 名 | 信仰 |
| rely on | depend on, rely on, count on | 動 | 頼る |
| remain | remain, survive, be left | 動 | 残る |
| remark | comment, criticism, review, remark | 名 | 批評 |
| remark | comment, remark | 名 | 発言 |
| remarkable | noticeable, remarkable, outstanding, striking | 形 | 顕著な |
| remember | remember, remind, recall, recollect | 動 | 思い出す |
| remind | remember, remind, recall, recollect | 動 | 思い出す |
| remote | distant, far, remote | 形 | 遠い |
| rent | borrow, rent, lease | 動 | 借りる |
| rent | borrow, lend, loan, rent | 動 | 借りる |
| rent | lend, rent, lease | 動 | 貸す |
| repair | fix, repair, mend | 動 | 修理する |
| replica | copy, replica | 名 | 複製 |
| reply | answer, reply, respond | 動 | 答える |
| reputation | reputation, prestige, name, image | 名 | 評判 |
| request | ask, order, request | 動 | 頼む |
| require | claim, demand, require | 動 | 要求する |
| rescue | help, assist, rescue, save | 動 | 助ける |
| research | investigation, survey, research | 名 | 調査 |
| resemble | resemble, similar | 形 | 似ている |
| reserve | book, reserve | 動 | 予約する |
| reserved | modest, moderate, reserved | 形 | 控えめの |
| resign | retire, resign, quit, leave | 動 | 辞める |
| resolution | decision, resolution | 名 | 決心 |
| resolution | solution, resolution | 名 | 解決 |
| resolve | solve, resolve | 動 | 解決する |
| respect | admire, respect, look up to | 動 | 尊敬する |
| respectable | respectable, respectful, respective | 形 | 立派な |
| respectful | respectable, respectful, respective | 形 | 立派な |
| respective | respectable, respectful, respective | 形 | 立派な |
| respond | answer, reply, respond | 動 | 答える |
| response | reaction, response | 名 | 反応 |
| rest | rest, stay, stop | 動 | 休む |
| restriction | limit, limitation, restriction | 名 | 制限 |
| result | result, effect, consequence | 名 | 結果 |
| result | result, conclusion | 名 | 結果 |
| retain | retain, keep | 動 | 保持する |
| retire | retire, resign, quit, leave | 動 | 辞める |
| reveal | demonstrate, indicate, reveal, show | 動 | 示す |
| reveal | expose, disclose, reveal | 動 | 暴露する |
| reverse | opposite,contrary,reverse,cont.. | 形 | 逆の |
| revise | change, improve, revise | 動 | 改める |
| revolve | turn, spin, revolve | 動 | 回る |
| reward | award, prize, reward | 名 | 賞 |
| rich | rich, wealthy, abundant | 形 | 豊かな |
| riddle | puzzle, riddle | 名 | 難題 |
| ridiculous | irrational, unreasonable, illogical, 他 | 形 | 不合理な |
| rife | common,widespread,ubiquitous,rife,prevalent | 形 | ありふれた |
| right | right, correct, accurate | 形 | 正しい |
| right now | right now, at the moment | 副 | 今のところ |
| ring | ring, clatter, rustle | 動 | 鳴る |
| rise | increase, multiply, rise | 動 | 増える |
| rise | rise, raise, arise | 動 | 上がる |
| risk | danger, risk, hazard | 名 | 危険 |
| risky | dangerous, risky, hazardous | 形 | 危ない |
| ritual | ceremony, ritual | 名 | 儀式 |
| rival | compete, contend, contest, rival | 動 | 争う |
| review | comment, criticism, review, remark | 名 | 批評 |
| roast | bake, fry, roast, grill | 動 | 焼く |
| rob | steal, rob | 動 | 盗む |
| robber | thief, robber | 名 | 泥棒 |
| root | origin, source, root | 名 | 根源 |
| rot | go bad, decay, rot, spoil | 動 | 腐る |
| rotate | turn, rotate | 動 | 回転する |
| row | row, line, file, rank | 名 | 行列 |
| rude | rude, impolite, ill-mannered, uncivil | 形 | 失礼な |
| rule | rule, regulation, law, act | 名 | 規則 |
| rustle | ring, clatter, rustle | 動 | 鳴る |