| (R) | Right, as in right arm or right leg. 
| Others |
| @r | Random Player
| Others |
| R | Angle of Reflection
| Others |
| R | Are
| Others |
| R | combined hormonal vaginal ring
| Others |
| R | Ideal Gas Constant (8.314 joules per Kelvin)
| Others |
| R | Rabbi
| Others |
| R | Rabbit
| Others |
| R | Rabid
| Others |
| R | Rabies
| Others |
| R | Race
| Others |
| R | Racer
| Others |
| R | Racial
| Others |
| R | Racing
| Others |
| R | Racism
| Others |
| R | Rack
| Others |
| R | Radfahrabteilung (German Bicycle Battalion, World War II)
| Others |
| R | Radial
| Others |
| R | Radiancy
| Others |
| R | Radians
| Others |
| R | Radiation
| Others |
| R | Radical
| Others |
| R | Radius
| Others |
| R | Rail
| Others |
| R | Railroad
| Others |
| R | Rain
| Others |
| R | Raise
| Others |
| R | Rally
| Others |
| R | Ralphable
| Others |
| R | Ramming
| Others |
| R | Rand
| Others |
| R | Rand (South Africa)
| Others |
| R | Random
| Others |
| R | Randy
| Others |
| R | Range
| Others |
| R | Range Rate
| Others |
| R | Rank
| Others |
| R | Rankine
| Others |
| R | Rankine Temperature Scale
| Others |
| R | Rare
| Others |
| R | Rarity
| Others |
| R | Rate
| Others |
| R | Rates
| Others |
| R | RATFOR (short for Rational Fortran) file
| Others |
| R | Ratio
| Others |
| R | Rational
| Others |
| R | Rationality
| Others |
| R | Rationing
| Others |
| R | Raw
| Others |
| R | Ray
| Others |
| R | Re-bill
| Others |
| R | Re-tell
| Others |
| R | Reach
| Others |
| R | Reactive
| Others |
| R | Read
| Others |
| R | Readability
| Others |
| R | Readiness
| Others |
| R | Real
| Others |
| R | Realistic
| Others |
| R | Reamer Temperature Ratio
| Others |
| R | Reap
| Others |
| R | Rear
| Others |
| R | Reasonable
| Others |
| R | Rebelion
| Others |
| R | Rebill
| Others |
| R | Rebounds
| Others |
| R | Receive
| Others |
| R | Received solid signal
| Others |
| R | Receptive
| Others |
| R | Receptor
| Others |
| R | Rechts
| Others |
| R | Recipe
| Others |
| R | Reciprocal
| Others |
| R | Reciprocating
| Others |
| R | Recite
| Others |
| R | Recluse
| Others |
| R | Recognition
| Others |
| R | Recommended
| Others |
| R | Recommitment
| Others |
| R | Reconnaissance aircraft
| Others |
| R | Recovery
| Others |
| R | Rectal
| Others |
| R | Rectangle
| Others |
| R | Recto
| Others |
| R | Rector
| Others |
| R | Rectum
| Others |
| R | Recursive
| Others |
| R | Recycle
| Others |
| R | Redemption
| Others |
| R | Redundant
| Others |
| R | Redux
| Others |
| R | Reencoding
| Others |
| R | Refer
| Others |
| R | Referee
| Others |
| R | Refined
| Others |
| R | Refinement
| Others |
| R | Reflexive
| Others |
| R | Reform
| Others |
| R | Refrigerator car
| Others |
| R | Refused
| Others |
| R | Regensburg
| Others |
| R | Regiment
| Others |
| R | Regina
| Others |
| R | Regional
| Others |
| R | Regular
| Others |
| R | Regular Army
| Others |
| R | Regulate
| Others |
| R | Rehabilitate
| Others |
| R | Rehabilitation
| Others |
| R | Rehydratable
| Others |
| R | Rei
| Others |
| R | Reigned
| Others |
| R | Reinforcement
| Others |
| R | Reissue
| Others |
| R | Reject
| Others |
| R | Rejected
| Others |
| R | Rejoining
| Others |
| R | Relational
| Others |
| R | Relative
| Others |
| R | Relative Permeability
| Others |
| R | Relaxed
| Others |
| R | Relay
| Others |
| R | Released
| Others |
| R | Relevance
| Others |
| R | Relevant
| Others |
| R | Reliability
| Others |
| R | Relief
| Others |
| R | Religion
| Others |
| R | Reluctant
| Others |
| R | Remote
| Others |
| R | Removed
| Others |
| R | Renormalization
| Others |
| R | Rent
| Others |
| R | Repeat
| Others |
| R | Repent
| Others |
| R | Repetitive
| Others |
| R | Replace
| Others |
| R | Report
| Others |
| R | Repose
| Others |
| R | Reprint
| Others |
| R | Republican
| Others |
| R | Republicans
| Others |
| R | Repulsive
| Others |
| R | Required
| Others |
| R | Rerun
| Others |
| R | Research
| Others |
| R | Reserve
| Others |
| R | Reset
| Others |
| R | Resilience
| Others |
| R | Resist
| Others |
| R | Resistance
| Others |
| R | Resistance in Ohms
| Others |
| R | Resolution
| Others |
| R | Resources
| Others |
| R | Respect
| Others |
| R | Respectful
| Others |
| R | Respectfully
| Others |
| R | Responder
| Others |
| R | Responsibility
| Others |
| R | Responsible
| Others |
| R | Rest
| Others |
| R | Restart
| Others |
| R | Restatement of Law
| Others |
| R | Restraint
| Others |
| R | Result
| Others |
| R | Retailer
| Others |
| R | Retailer's price
| Others |
| R | Retardation
| Others |
| R | Retentive
| Others |
| R | Retreat
| Others |
| R | Returning
| Others |
| R | Reunite
| Others |
| R | Reuse
| Others |
| R | Revenue
| Others |
| R | Reverse
| Others |
| R | Revert
| Others |
| R | Review
| Others |
| R | Reviewing
| Others |
| R | Revision
| Others |
| R | Reward
| Others |
| R | Rex
| Others |
| R | Rhode Island State Library, Providence, Rhode Island Library Symbol
| Others |
| R | Rice
| Others |
| R | Richard
| Others |
| R | Rider
| Others |
| R | Ridiculous
| Others |
| R | Rifle
| Others |
| R | Right
| Others |
| R | Right on a photo (picture)
| Others |
| R | Righteousness
| Others |
| R | Rimorchio (trailer)
| Others |
| R | Ring
| Others |
| R | Riser
| Others |
| R | Risk
| Others |
| R | Risks
| Others |
| R | Risky
| Others |
| R | Rithmetic
| Others |
| R | Ritter (German: Knight)
| Others |
| R | River
| Others |
| R | Robber
| Others |
| R | Robin
| Others |
| R | Robotic
| Others |
| R | Rock
| Others |
| R | Rocks
| Others |
| R | Roentgen
| Others |
| R | Roger
| Others |
| R | Roll
| Others |
| R | Rolled
| Others |
| R | Rollicking
| Others |
| R | Ronald
| Others |
| R | Rook
| Others |
| R | Room
| Others |
| R | Rosary
| Others |
| R | Roster
| Others |
| R | Rosy
| Others |
| R | Rounded
| Others |
| R | Route
| Others |
| R | Routine
| Others |
| R | Row
| Others |
| R | Roy
| Others |
| R | Rubber
| Others |
| R | Rubbish
| Others |
| R | Rudolph
| Others |
| R | Rugged
| Others |
| R | Rule
| Others |
| R | Rumex
| Others |
| R | Run
| Others |
| R | Runner
| Others |
| R | Russian
| Others |
| R | Rwanda
| Others |
| R | Search Radius
| Others |
| R | The Resurrection
| Others |
| R | Yaw Rankine Rate
| Others |
| R$ | Robux
| Others |