| Subject | English | Spanish |
| med. | African sleeping sickness | tripanosomiasis africana (morbus dormitivus) |
| med. | African sleeping sickness | tripanosomiasis del Congo (morbus dormitivus) |
| health. | African sleeping sickness | enfermedad del sueño |
| med. | African sleeping sickness | nelaván (morbus dormitivus) |
| health. | African sleeping sickness | tripanosomiasis humana africana |
| health. | African sleeping sickness | tripanosomiasis africana |
| med. | African sleeping sickness | enfermedad del sueño (morbus dormitivus) |
| med. | cerebral synchronised sleep | sueño profundo |
| nat.sc., energ.ind. | "deep sleep" mode | modo "espera reforzada" |
| med. | disturbance of unbroken sleep | perturbación del segundo sueño |
| med. | excessive necessity for sleep | clinomanía |
| med. | hypnotic sleep | sueño hipnótico |
| transp. | International Sleeping-car and Touring Company | Compañía Internacional de coches-camas |
| transp. | International Sleeping-car and Touring Company | C.I.W.L. Turismo |
| transp. | International Sleeping-Car Company | Compañía Internacional de Coches-Cama y de los Grandes Expresos Europeos |
| gen. | lull to sleep | aletargar |
| gen. | lulling to sleep | dormidero |
| med. | NREM sleep | sueño de ondas lentas |
| med. | NREM sleep | sueño ortodoxo |
| med. | NREM sleep | sueño lento |
| med. | NREM sleep | sueño NREM |
| health. | paradoxical sleep | sueño de onda rápida |
| med. | paradoxical sleep | sueño paradójico |
| med. | paradoxical sleeping phase | fase paradójica del sueño |
| med. | physical sleep | sueño físico |
| med. | prolonged sleep | sueño prolongado |
| health. | rapid eye-movement sleep | sueño de onda rápida |
| health. | REM sleep | sueño de onda rápida |
| health. | restless sleep | sueño inquieto |
| h.rghts.act., social.sc. | rough sleeping | sin techo |
| health., med. | sleep apnea syndrome | síndrome de la apnea del sueño |
| health., med. | sleep apnea syndrome | síndrome de apnea del sueño |
| health., med. | sleep apnoea syndrome | síndrome de la apnea del sueño |
| h.rghts.act., health. | sleep deprivation | privación de sueño |
| med. | sleep disorders | trastornos del sueño |
| health. | sleep disturbance | trastorno del sueño |
| health. | sleep disturbance | alteracion del sueño |
| environ. | sleep disturbance | alteración del sueño |
| gen. | sleep-inducing | que causa o induce al sueño o sopor |
| med. | sleep-inducing drugs | hipnoticos |
| IT | "sleep" mode | modo de espera |
| med. | sleep required by infants | sueño del lactante |
| nat.sc., transp. | sleeping accommodation | plaza acostada |
| gen. | sleeping-accommodation | cama |
| transp. | sleeping-accommodation charge | tarifa de plazas acostadas |
| textile | sleeping bag | saco de dormir |
| patents. | sleeping bags | sacos de dormir |
| gen. | sleeping bags sheeting | sacos de dormir fundas cosidas que sustituyen a las sábanas |
| gen. | sleeping bags for camping | sacos de dormir para camping |
| transp. | sleeping berth | plaza de cama |
| transp. | sleeping-berth supplement | billete de litera |
| transp. | sleeping-berth supplement | suplemento de litera |
| transp. | sleeping-berth voucher | billete de litera |
| transp. | sleeping-berth voucher | suplemento de litera |
| gen. | sleeping berths for vehicles | literas para vehículos |
| gen. | sleeping car | cochecama |
| transp. | sleeping car | coche dormitorio |
| transp. | sleeping car | coche cama |
| transp. | sleeping car | coche-camas |
| transp. | sleeping car | coche de plazas acostadas |
| gen. | sleeping-car | coche-cama |
| transp. | sleeping-car attendant | encargado de coche-cama |
| transp. | sleeping-car attendant | camarero |
| transp. | sleeping-car voucher | boletín de coche cama |
| transp. | sleeping-car voucher | suplemento de coche cama |
| transp. | sleeping-car voucher | billete de coche-cama |
| transp. | sleeping-car voucher | suplemento de coche-cama |
| transp. | sleeping-car voucher | boletín de coche-cama |
| transp. | sleeping-car voucher | billete de coche cama |
| gen. | sleeping cars | vagones-cama coches-cama |
| gen. | sleeping cars | vagones camas |
| transp. | sleeping compartment | compartimento de descanso |
| vet.med. | sleeping disease | tripanosomosis animal africana |
| vet.med. | sleeping disease | enfermedad del sueño |
| vet.med. | sleeping disease | nagana |
| med. | sleeping kidney | riñón durmiente |
| bank. | sleeping partner | socio capitalista |
| bank. | sleeping partner | comanditario |
| IMF. | sleeping partner | socio comanditario |
| health. | sleeping pill | soporífero |
| health. | sleeping pill | somnífero |
| gen. | sleeping pill | soporifero |
| health. | sleeping pill | pastilla para dormir |
| gen. | sleeping pill | somnifero |
| gen. | sleeping-place | cama |
| transp., construct. | sleeping policeman | resalto |
| IT, dat.proc. | sleeping range | rango de reserva |
| h.rghts.act., social.sc. | sleeping rough | sin techo |
| health. | sleeping sickness | tripanosomiasis africana |
| health. | sleeping sickness | enfermedad del sueño |
| health. | sleeping sickness | tripanosomiasis humana africana |
| health., agric., engl. | sleeping sickness of cattle | nagana |
| vet.med. | sleeping sickness of cattle | enfermedad del sueño |
| vet.med. | sleeping sickness of cattle | tripanosomosis animal africana |
| industr., construct. | sleeping suit | pijama |
| med. | sleeping tablet | hipnótico |
| gen. | sleeping tablet | que induce sueño |
| gen. | When sleeping people usually close their eyelids | Durmiendo, la gente normalmente cierra los párpados |
| transp., construct. | workman's sleeping coach | vagón alojamiento |
