| Rubaiyat | Rubaiyat of Omar Khayyam |
| ruban | band |
| ruban adhésif | tape |
| Ruban bleu | Blue Riband |
| Ruban d’arrivée | Tape |
| Ruban ondulé | Riband Wave |
| Ruban Rose | Pink ribbon |
| ruban à mesurer | tape measure |
| Rubato | Tempo rubato |
| Rubber | Rubber |
| Rubbiatron | Energy amplifier |
| Ruben | Reuben |
| Ruben Boumtje-Boumtje | Ruben Boumtje-Boumtje |
| Ruben Kun | Ruben Kun |
| Ruben Perez Moreno | Rubén Pérez |
| Ruben Plaza | Rubén Plaza |
| Ruben Ramirez Hidalgo | Rubén Ramírez Hidalgo |
| Ruben Sosa | Rubén Sosa |
| Rubens Barrichello | Rubens Barrichello |
| Rubeus Hagrid | Rubeus Hagrid |
| Rubiaceae | Rubiaceae |
| Rubiales | Rubiales |
| Rubicon | Rubicon |
| rubicond | ruddy |
| rubidium | rubidium |
| Rubielos de Mora | Rubielos de Mora |
| Rubigen | Rubigen |
| Rubik’s Cube | Rubik's cube |
| Rubin Kazan | FC Rubin Kazan |
| Rubinstein | Rubinstein |
| rubis | jewel |
| RubisCO | RuBisCO |
| Rubizhne | Rubizhne |
| rubrique | rubric |
| Rubrique des spectacles | List of plays |
| Rubrouck | Rubrouck |
| Rubus | Rubus |
| Rubus leucodermis | Rubus leucodermis |
| Rubus saxatilis | Rubus saxatilis |
| Ruby | Ruby |
| Ruby Lin | Ruby Lin |
| Rubén Berríos | Rubén Berríos |
| Rubén Darío | Rubén Darío |
| Rubén De la Red | Rubén de la Red |
| Rubén Lobato Elvira | Rubén Lobato |
| rubéole | rubella |
| Rubí | Rubí |
| Ruch Autonomii Śląska | Silesian Autonomy Movement |
| ruche | beehive |
| rucher | apiary |
| ruché | frilly |
| Ruckers | Ruckers |
| Rud Hudibras | Rud Hud Hudibras |
| Ruda Śląska | Ruda Śląska |
| Rudaba | Rudaba |
| Rudaki | Rudaki |
| Rudar Velenje | Rudar Velenje |
| Rudbeckia | Black-eyed Susan |
| Ruddells Mills | Ruddells Mills |
| rude | abrupt |
| Rude boys | Rude boy |
| Rude épreuve | Painful experience |
| rudement | roughly |
