British English to American English: Letter R
Racecourse (horses) racetrack
          Railway Railroad
          Railway carriage Railroad car
          Railway line Rail track
          Railway point Switch
          Railway sleeper Cross tie
          Railway station Train station
          Rancour  Rancor
          Randomise Randomize 
          Rashers Slices of bacon
          Ratal =  
          Rather than Instead of
          Rating = an enlisted Royal naval person  
          Rationalise Rationalize 
          Re- (see hyphenation) Re- (see hyphenation)
          Reader Associate professor
          Reafforestation Reforestation
          Realise  Realize
          Realisable Realizable
          Realisation realization
          Re-appoint Reappoint
          Reception  Front desk
        Receptionist  Desk clerk

          Recliner Lazy-boyTM
          Reckon Think
          Recognise Recognize
          Reconnoitre  Reconnoiter
          Redbrick university =  
          Red pepper Bell pepper
          Redundancy pay Severance pay
          Redundant Unemployed
          Reel (thread) Spool (thread)
          Refectory Canteen
          Refuelling Refueling
          Refuse Garbage
          Registry office =  
          Remand =  
          Remand home = Borstal
          Remodelling Remodeling
          Removal company Moving company
          Removal van Moving van
          Rend, rent, rent Rend, rended, rended
          Reorganise Reorganize
          Restaurant car Dining Car
          Retail trade Retail business
          Return ticket  Round-trip ticket
          Reverse charges  Collect call
          Call reverse charges Call collect
          Renegue Renege
          Reverse light Back-up light
          Revitalise Revitalize 
          Revolutionise Revolutionize
          Rhino Rhinoceros
          Ricochetted Ricocheted
          Ricochetting Ricocheting

          Rigour  Rigor
          Ritualise Ritualize 
          Ring  Call
          Ring road Beltway, loop
          Rivalled Rivaled
          Rivalling Rivaling
          Rivetted Riveted
          Rivetting Riveting
          Rocket (veg.) arugula, rugola
          Romanticise Romanticize 
          Roof rack Luggage rack
          Rosé (wine) Blush (wine)
          Rota Roster/schedule
          Rouble Ruble
          Round (the corner) Around (the corner)
          Roundabout  Traffic circle/Rotary
          Routeing  Routing
          Routinise Routinize 
          Row Argument/argue
          Rowlock Oarlock
          Rowing boat Row boat
          Rubber  Eraser
          Rubbish = waste Trash/Garbage (food waste)
          Rucksack Backpack (n.)
          Rumour Rumor
          Rumbustious Rambunctious
          Rumpus Ruckus
          Runner bean String bean
          Run-up to… Lead-up to…
Have I missed anything? Send in your American/British differences now.


