| Subject | Spanish | English |
| met. | acero endurecido con nitrógeno | nitrogen-toughened steel |
| industr., construct. | caucho en polvo obtenido a partir de desperdicios o restos de caucho sin endurecer | powder obtained from waste or scrap of rubber |
| industr., construct. | caucho endurecido | ebonite |
| transp., industr. | caucho endurecido | hard rubber |
| gen. | caucho endurecido ebonita | ebonite vulcanite |
| environ. | caucho sin endurecer | rubber other than hard rubber |
| chem. | caucho sin endurecer | unhardened rubber |
| industr., construct., mech.eng. | clavo de acero endurecido | hardened steel nail |
| el. | dispositivo endurecido | hardened device |
| met. | endurecer en frío | peen hardening |
| pack. | endurecer se | vulcanize |
| pack. | endurecer se | cure |
| fish.farm. | endurecerse exteriormente | case harden |
| tech. | endurecerse por envejecimiento | age harden |
| chem. | goma virgen sin endurecer | gel rubber |
| construct. | hormigón endurecido | hardened concrete |
| commun. | horno para endurecer las placas | plate baking oven |
| med. | hígado endurecido | hepar induratum |
| met. | lacado termo-endurecido | stove lacquering |
| construct. | ladrillo endurecido químicamente | unburned brick |
| met. | plomo endurecido | hard lead |
| patents. | preparaciones para reforzar y endurecer las uñas | preparations for reinforcing and strengthening nails |
| tech. | proceso de endurecer la superficie del acero dulce | pack harden |
| chem., met. | secado endurecido | hard dry |
| industr., construct. | tablero endurecido al calor | heat-treated hardboard |
| industr., construct., chem. | vidrio endurecido | heat-strengthened glass |
| industr., construct., chem. | vidrio endurecido químicamente | chemically-strengthened glass |
| med. | yeso endurecido | pottery plaster |
