- reduction to cartesian form (mathematics)
 - round robin
 - renal lobe
 - rapture
 - renal colic
 - renal failure
 - repetitively
 - relating or belonging to
 - relief valve
 - rat chinchilla
 - renal plexus
 - renal segment
 - rattle away
 - retrain
 - reamer
 - raise hand against
 - rooster
 - reprehend
 - rimmed
 - react against
 - ridged gourd
 - regally
 - rancorously secretive
 - reperusal
 - remarry
 - release of funds
 - resource management
 - resent
 - retentates
 - retrogradation
 - red incrustation on iron (used as medicine)
 - rowan
 - reply and counter reply
 - renowned throughout the whole world
 - raise eyebrows
 - random
 - redirect
 - rationale behind a thing
 - registry office
 - rhamnus cathartica
 - root canal
 - re_enlargement
 - republican system of government
 - record strip
 - royal throne
 - ropedancer
 - ropy solution
 - randomization
 - restaurant car
 - rouleaux of blood corpuscle