| retractable | retractable |
| retractación | recantation |
| retractar | revoke |
| retractarse | cry off |
| retracto | option |
| retraer | retract |
| retrasada | dope |
| retrasado | put off |
| retrasado mental | fucktard |
| retrasar | check |
| retrasarse | lag behind |
| retraso | delay |
| retraso mental | backwardness |
| retratar | picture |
| retratista | portraitist |
| retrato | depiction |
| Retrato Chandos | Chandos portrait |
| Retrato de Adele Bloch-Bauer I | Portrait of Adele Bloch-Bauer I |
| Retrato de Baltasar de Castiglione | Portrait of Balthasar Castiglione |
| Retrato de Bindo Altoviti | Portrait of Bindo Altoviti |
| Retrato de Elisabetta Gonzaga | Portrait of Elisabetta Gonzaga |
| Retrato de Esmeralda Brandini | Portrait of a Lady known as Smeralda Bandinelli |
| Retrato de Giovanni Arnolfini y su esposa | Arnolfini Portrait |
| Retrato de hombre con la medalla de Cosme el Viejo | Portrait of a Man with a Medal of Cosimo the Elder |
| Retrato de joven | Portrait of a Young Man |
| retrato de medio cuerpo | half-length |
| Retrato de Sigismondo Pandolfo Malatesta | Portrait of Sigismondo Pandolfo Malatesta |
| Retrato de un músico | Portrait of a Musician |
| Retrato de una dama | The Portrait of a Lady |
| Retrato de una princesa de la casa de Este | Portrait of Princess |
| Retrato del artista adolescente | A Portrait of the Artist as a Young Man |
| Retrato del gran maestre de la Orden de Malta Alof de Wignacourt | Portrait of Alof de Wignacourt and his Page |
| Retrato fotográfico | Portrait photography |
| Retratos de una obsesión | One Hour Photo |
| retraído | timid |
| retrete | toilet |
| retrete fuera de la casa | outhouse |
| retrete para caballeros | men's room |
| retribución | compensation |
| retribuir | reward |
| retributivo | retributive |
| Retriever de Pelo Rizado | Curly Coated Retriever |
| retroacción | feedback |
| Retroactividad | Feedback |
| retroactivo | retroactive |
| retroceder | withdraw |
| retroceso | regression |
| Retrocognición | Retrocognition |
| retrocohete | retrorocket |
| retrocompatibilidad | backward compatibility |
| retrocompatible | backward compatible |
| Retrogradación de los planetas | Retrogradation |
| retroiluminado | backlit |
| RetroInformática | Retrocomputing |
| retrospección | retrospection |
| retrospectiva | flashback |
| retrospectivamente | in retrospect |
| retrospectivo | retrospective |
| retrovirus | retrovirus |
| retrovisor | driving mirror |
| retruécano | pun |
| retráctil | retractable |
| retrógrado | retrogressive |
| retrónimo | retronym |
| retsina | retsina |
| retuit | retweet |
| retuiteo | retweet |
| retumbante | high-sounding |
| retumbar | roll |
| retumbo | boom |
| retén | checkpoint |
| retículo | second stomach |
| retículo endoplásmico | endoplasmic reticulum |
| retórica | eloquence |
| retórico | rhetorical |
| Reuben Fine | Reuben Fine |
| reuma | rheumatism |
| reumatismo | rheumatism |
| reumatoide | rheumatoid |
| reumatoideo | rheumatoid |
| reumático | rheumatic |
| reunido | accumulated |
| reunificación | reunification |
| Reunificación alemana | German reunification |
| Reunificación de Corea | Korean reunification |
| reunion | union |
| reunionés | Reunionese |
| reunir | join |
