高中英文參考詞彙表：第六級 R

radiant
radiate
radioactive
radish
radius
rap
rash
ratify
realization
reap
reckless
reckon
reconcile
recreational
redundancy
reef
referee
referendum
refine / refinement
reflective
refresh / refreshment
refreshment / refreshments
refute
rehabilitate
rehearse
reign
rejoice
relay
relentless
reliance
reliant
relic
remainder
reminiscent
renowned
reproduce
reptile
resent / resentment
reside
resistant
respective
restoration
restrain
restraint
retort
retrieve
revelation
revival
revive
revolt
revolve
rigorous
ripple
rivalry
roam
robust
rotate
rotation
royalty
rubbish
rugged
ruthless