| Subject | English | Spanish |
| med. | aortic arch syndrom | enfermedad sin pulso |
| med. | aortic arch syndrom | síndrome del arco aòrtico |
| med. | aortic arch syndrome | anomalía del arco aórtico |
| scient. | arch axis | directriz del arco |
| construct. | arch barrel | bóveda inclinada |
| construct. | arch beam | viga en arco |
| gen. | arch breaker | rompebóvedas |
| gen. | arch breaker | nivelador |
| met., construct. | arch brick | ladrillo de boveda |
| industr., construct. | arch brick | ladrillo recocho, demasiado cocido |
| construct. | arch bridge with suspended deck | arco con pasadera suspendida |
| construct. | arch buttress dam | presa de contrafuertes de planta curva |
| construct. | arch center | cercha |
| transp., construct. | arch center for crest | centro del arco de la coronación |
| construct. | arch centering | cimbra |
| construct. | arch centre | cercha |
| transp. | arch culvert | alcantarilla en bóveda |
| el., construct. | arch dam | presa bóveda |
| el.gen. | arch dam | presa de bóveda |
| el., construct. | arch dam | presa arco |
| transp., construct. | arch elevation | cota del arco superior |
| transp. | arch, encastré | arco empotrado |
| mech.eng. | arch girder | puente de carro interior |
| construct. | arch girder | viga en arco |
| construct. | arch-gravity dam | presa de arco gravedad |
| coal. | arch joint | ensamblaje de los cuadros |
| met. | arch of a furnace | bóveda de un horno |
| med. | arch of Corti | arco de Corti |
| footwear | arch of the foot | arco del pie |
| transp. | arch panel | panel de arco |
| crim.law., life.sc. | arch pattern | diseño digital tipo arco |
| construct. | arch rise | flecha del arco |
| coal. | arch set | marcos |
| industr., construct., chem. | arch-shaped cutting | corte en arcos |
| industr., construct., chem. | arch-shaped cutting | corte en arcadas |
| med. | arch-shaped orthodontic apparatus | aparato de ortodoncia en forma de arco |
| med. | arch-shaped orthodontic appliance | aparato de ortodoncia en forma de arco |
| transp., construct. | arch span | separación interior entre los contrafuertes |
| transp., construct. | arch span | luz de la bóveda |
| transp., construct. | arch springing line impost | arranque de bóveda |
| transp., construct. | arch stone | dovela |
| industr., construct. | arch support | cambrillón |
| med. | arch-support device | mecanismo de soporte del arco |
| gen. | arch supports for boots and shoes | resortes para curvaturas de zapatos |
| gen. | arch supports for boots and shoes | resortes para curvaturas de calzados |
| gen. | arch supports for boots and shoes | resortes para curvaturas de calzado |
| transp., construct. | arch thrust | empuje horizontal |
| transp., construct. | arch thrust | empuje del arco |
| construct. | arch truss | viga en arco |
| transp. | arch tube | tubo de bóveda |
| transp. | arch tube | tubo de arco |
| industr., construct., chem. | cavity-arch cooling | enfriamiento indirecto |
| transp., construct. | constant angle arch dam | presa de bóveda de ángulo constante |
| construct. | constant radius arch dam | presa bóveda de radio constante |
| construct. | constant radius arch dam | presa bóveda de centro constante |
| construct. | constant thickness arch dam | presa bóveda de espesor constante |
| construct. | cylindrical arch dam | presa bóveda cilíndrica |
| med. | dental arch expander | extensor del arco dentario |
| construct. | double curvature arch dam | presa de doble curvatura |
| construct. | elliptical arch dam | presa bóveda elíptica |
| chem., el. | end-arch brick | cuña |
| life.sc., construct. | gravity arch dam | dique curvilineo |
| med. | Hammond wire-arch splint | férula de arco de Hammond |
| transp., construct. | horizontal arch element | anillo horizontal |
| med. | index of plantar arch Bragard | índice del arco plantar de Bragard |
| med. | index of plantar arch Bragard | índice del arco plantar |
| med. | lateral part of the longitudinal arch of the foot | parte lateral del arco longitudinal del pie (pars lateralis arcus longitudinalis pedis) |
| med. | lingual-arch lock | fijación Mershon |
| construct. | logarithmic spiral arch dam | presa bóveda de espiral o logarítmica |
| med. | medial part of the longitudinal arch of the foot | parte medial del arco longitudinal del pie (pars medialis arcus longitudinalis pedis) |
| construct. | multi-centred arch dam | presa bóveda de varios centros |
| construct. | multiple arch dam | presa de bóvedas múltiples |
| construct. | parabolic arch dam | presa bóveda parabólica |
| coal. | pressure arch theory | teoría de la presión de arco |
| med. | ribbon arch of E.H.Angle | arco de Angle |
| chem., el. | side-arch brick | cuchillo |
| construct. | single curvature arch dam | presa bóveda de simple curvatura |
| construct. | spandrel-braced arch bridge | puente en arco con tablero superior |
| coal. | strutting of arch supports | arriostrar |
| construct. | thick arch dam | presa de arco |
| construct. | thick arch dam | presa de bóveda |
| construct. | thick arch dam | gruesa |
| construct. | thin arch dam | presa de bóveda delgada |
| construct. | tied arch bridge | puente en arco con tablero colgante |
| agric., tech. | tractor-arch unit | arco de arrastre para tractor |
| agric., tech. | tractor-arch unit | arco de arrastre de troncos |
| agric., tech. | tractor-arch unit | arco de arrastre |
| construct. | tubular arch bridge | puente de arco tubular |
| construct. | variable radius arch dam | presa bóveda de radio variable |
| construct. | variable radius arch dam | presa bóveda de centro variable |
| construct. | variable thickness arch dam | presa bóveda de espesor variable |
| transp. | water-tube arch support | tubo de bóveda |
| transp. | water-tube arch support | tubo de arco |