| severely | seriamente |
| severely damaged | estropeado |
| Severiano Ballesteros | Severiano Ballesteros |
| Severin | Severino |
| severity | rigor |
| Severn | Río Severn |
| Severn River | Río Severn |
| Severnaya Zemlya | Severnaya Zemlya |
| Severny Island | Isla Norte |
| Severo Ochoa | Severo Ochoa |
| Severo Sarduy | Severo Sarduy |
| Severus Snape | Severus Snape |
| Sevgein | Sevgein |
| Sevice load | Carga útil |
| Sevier County | Condado de Sevier |
| Sevilla | Sevilla |
| Sevilla Atlético | Sevilla Atlético |
| Sevilla FC | Sevilla Fútbol Club |
| Sevillan | sevillano |
| Seville | Sevilla |
| Seville Cathedral | Catedral de Santa María de Sevilla |
| Seville Fair | Feria de Abril |
| Seville Metro | Metro de Sevilla |
| Sevillian | sevillano |
| sew | coser |
| sewage | aguas cloacales |
| sewage farm | terreno de decantación |
| sewer | alcantarilla |
| sewerage | alcantarillado |
| sewing | costura |
| sewing machine | máquina de coser |
| sex | relación |
| Sex addiction | Adicción al sexo |
| Sex and Lucia | Lucía y el sexo |
| Sex and the City | Sex and the City |
| sex appeal | sex-appeal |
| sex bomb | bomba sexual |
| sex change | cambio de sexo |
| Sex doll | Muñeca hinchable |
| sex drive | libido |
| sex education | educación sexual |
| sex hormone | hormonas de sexo |
| Sex in advertising | Sexo en la publicidad |
| Sex magic | Magia Sexual |
| sex organs | órganos sexuales |
| Sex Pistols | Sex Pistols |
| sex ratio | razón de sexo |
| sex shop | sex shop |
| Sex therapy | Terapia sexual |
| sex tourism | turismo sexual |
| sex toy | juguete sexual |
| sex worker | trabajadora sexual |
| Sex-staved | Identidad sexual |
| sexagenarian | sexagenario |
| sexism | sexismo |
| sexist | sexista |
| sexless | asexual |
| Sexo con Amor | Sexo con amor |
| sexology | sexología |
| Sextans | Sextante |
| Sextans Dwarf Spheroidal | Sextante |
| sextant | sextante |
| sextet | sexteto |
| sextillion | sextillón |
| sexting | sextear |
| sexton | sacristán |
| sextuple | séxtuplo |
| sextuplet | séxtuplo |
| sextuplets | seis mellizos |
| Sextus Afranius Burrus | Sexto Afranio Burro |
| Sextus Caecilius Africanus | Sexto Cecilio Africano |
| Sextus Empiricus | Sexto Empírico |
| Sextus Julius | Sexto Julio César |
| Sextus Julius Africanus | Sexto Julio Africano |
| Sextus Julius Caesar | Sexto Julio César |
| Sextus Julius Frontinus | Sexto Julio Frontino |
| Sextus Martinianus | Martiniano |
| Sextus Pompeius | Sexto Pompeyo |
| Sextus Propertius | Propercio |
| Sextus Tarquinius | Sexto Tarquinio |
| sexual | carnal |
| sexual act | coito |
| Sexual addiction | Adicción al sexo |
| sexual appetite | apetito sexual |
| sexual behavior | comportamiento sexual |
