R

racial

radiant

radioactive

radius

rage

ranch

random

range

rapid

rare

rate

ratio

raw

ray

react

reality

reason

reassure

rebel

recall

recede

receive

recent

recess

recite

reckless

reckon

recognize

recollect

recommend

reconcile

recover

recruit

recur

reduce

refer

reflection

refrain

refrigerator

refugee

refuse

regard

regardless

region

register

regret

reign

relate

release

relief

relieve

relish

reluctant

rely

remain

remark

remedy

remind

remote

remove

renew

renounce

repair

repent

represent

request

require

requirement

resemble

resent

reside

resident

resign

resist

resource

resort

respect

respectable

respond

restore

restrain

restrict

result

resume

retain

retire

retort

retreat

retrieve

returnee

reveal

revenue

reverence

reverse

revise

revolt

revolution

reward

rhyme

riddle

ridicule

ridiculous

rigid

riot

ritual

roam

rob

role

root

rot

rotten

routine

row

royal

rub

rubbish

rude

ruin

rural

ruthless