A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
| RADAR | RAGDOLL | |
| RAGE | RAGGEDY ANN | |
| RAGING BULL | RAGMOP | |
| RAGS | RAGTIME | |
| RAGU | RAIDER | |
| RAIN | RAINBOW | |
| RAISIN | RAJAH | |
| RALPH | RAMBO | |
| RANGER | RASCAL | |
| RASSELAS | RASTA | |
| RAVEL | RAVEN | |
| RAWHIDE | RAY | |
| RAZZ | RAZZMATAZZ | |
| REBEL | RED or REDHEAD | |
| REDBEARD | REEBOK | |
| REEF | REGALO | |
| REM | REMINGTON | |
| REMY | RENEGADE | |
| RENO | REPO | |
| REUBEN | REX | |
| RHAPSODY | RHEA | |
| RHETT | RHINESTONE | |
| RHINO | RHODES | |
| RHONE | RICHES | |
| RICKY-TICKY-TAVI | RICOCHET | |
| RICOTTA | RIDER | |
| RIFFRAFF | RIN TIN TIN | |
| RINGLEADER | RINGO | |
| RIO | RIP VAN WINKLE | |
| RIPLEY | RIPPLE | |
| RITZ or RITZY | ROACH | |
| ROB ROY | ROCCA | |
| ROCK | ROCKER | |
| ROCKET | ROCKO or ROCKY | |
| ROCOCO | RODEO | |
| ROGAN | ROGUE | |
| ROJO | ROLLS | |
| ROMA | ROMEO | |
| ROMULUS | RONDEAU | |
| ROO (KANGAROO) | ROOKIE | |
| ROOSTER | ROOT BEER | |
| ROSARITA | ROSCOE | |
| ROSEBUD | ROSIE | |
| ROT | ROTHSCHILD | |
| ROTTEN | ROVER | |
| ROWDY | ROXANNE | |
| ROXY | ROYAL | |
| RUBY | RUFF | |
| RUFFIAN | RUFFLES | |
| RUFUS | RUGRAT | |
| RUMPELSTILTSKIN | RUNNER | |
| RUNT | RUPERT | |
| RUSTY |