| Subject | English | Spanish |
| el., acoust. | acoustic stiffness | rigidez acústica |
| earth.sc. | aerodynamic stiffness | rigidez aerodinámica |
| med. | anti-stiffness factor | factor antirrigidez |
| transp. | bending stiffness | resistencia a la flexión |
| textile | bending stiffness | rigidez a la curvatura |
| transp., mater.sc. | blade chordwise stiffness | rigidez de la pala en arrastre |
| met. | dimple stiffness | rigidez a la abollonadura |
| scient. | elemental stiffness matrix | matriz de rigidez de los elementos |
| life.sc. | frost stiffness | rigidez ocasionada por la helada |
| med. | hip stiffness phenomenon | fenómeno de rigidez de la cadera |
| transp., mater.sc. | hub flapping stiffness | rigidez del buje en batimiento |
| transp., mater.sc. | hub flapping stiffness | rigidez de la cabeza de rotor en batimiento |
| med. | joint stiffness | rigidez articular |
| scient. | lumped mass and stiffness model | modelo discreto a base de masas y rigideces |
| transp. | matched-stiffness blade | pala de rigideces armonizadas |
| med. | morning stiffness | rigidez articular matutina |
| mech.eng. | rope stiffness coefficient | coeficiente de rigidez del cable |
| gen. | spatial stiffness | rigidización |
| gen. | spatial stiffness | arriostramiento |
| earth.sc., mater.sc. | specific stiffness | rigidez específica |
| mech.eng. | spring stiffness | constante del muelle |
| lab.law. | stiffness across width of the shoe | rigidez transversal del calzado |
| construct. | stiffness constant | constante de rigidez |
| acoust. | stiffness control | regulación de la rigidez acústica |
| transp., mater.sc. | stiffness criterion | criterio de rigidez |
| earth.sc. | stiffness factor | factor de rigidez |
| earth.sc. | stiffness factor | coeficiente de rigidez |
| pack. | stiffness in bend | rigidez a la flexión |
| pack. | stiffness in flexure | rigidez a la flexión |
| health. | stiffness law | ley de rigidez |
| construct. | stiffness matrix | matriz de rigidez |
| transp., construct. | stiffness of a plate | rigidez de una chapa |
| mech.eng. | stiffness of a spring | rigidez de un resorte |
| med. | stiffness of neck | rigidez de la nuca |
| mech.eng. | stiffness of the rope | rigidez del cable |
| tech., industr., construct. | stiffness tester | aparato de ensayo de rigidez |
| gen. | stiffness tester | aparato para ensayos de rigidez |
| industr., construct. | stiffness/weight ratio | relación rigidez/peso |
| nat.sc. | structural stiffness | rigidez estructural |
| industr., construct. | torsion stiffness | rigidez en torsión |
| industr., construct. | torsional stiffness | rigidez en torsión |
| construct. | transverse stiffness | reforzamiento transversal |
