R
- Ragamuffin – person wearing tattered clothes
- Rakish – dashing, stylish, disreputable
- Rampant – uncontrolled, unchecked
- Rankle – irritate
- Rant – speak or shout at length in an angry, impassioned way
- Rapacious – greedy, materialistic
- Rarefied – private, being less dense
- Raspy – harsh
- Raucous – harsh, sharp
- Ratiocination – logical reasoning
- Ravenous – extremely hungry
- Raze – destroy completely
- Rebus – a riddle or puzzle made up of letter, pictures or symbols
- Recalcitrant – obstinately defiant of authority, difficult to manage or operate
- Recluse – a person who lives alone and avoid other people
- Recondite – little knowledge, obscure
- Recourse – option, possibility, choice
- Recrimination – blaming each other
- Recuperate – recover
- Recurrent – occurring again and again
- Reek – stink, foul smell
- Refulgent – brightly shinning, gleaming
- Regale – entertain
- Regimen – prescribed diet and habits
- Rejoinder – a reply especially a witty and sharp one
- Relent – become less severe or intense
- Relinquish – give up, renounce
- Remonstrate – protest, objection
- Rend – split, tear apart
- Reparation – amends, repayment, repair something
- Repast – meal, feast, banquet
- Repository – storehouse
- Repudiate – disown, disavow
- Respite – interval of relief, time for rest
- Restitution – compensation, refund
- Restive – impatient
- Resuscitate – revive
- Reticent – reserved, uncommunicative
- Retribution – punishment, penalty
- Ribald – rude, naughty
- Rife – widespread, general, common, universal, global
- Roil – to disturb
- Rostrum – podium, stage, platform
- Rote – a memorizing process using routine or repition often without full attention or comprehension
- Rout – defeat
- Ruddy – reddish, healthy looking
- Rue – regret
- Ruffian – thug, villain, scoundrel
- Ruminate – think deeply, chew the cud
- Rummage – search something unsystematically and untidily
