| Subject | English | Spanish |
| med. | comparative test | ensayo comparativo |
| agric. | comparative test | examen comparativo |
| environ. | comparative test | prueba comparativa |
| environ. | comparative test Tests conducted to determine whether one procedure is better than another | prueba comparativa |
| tech. | comparative test | ensayo de contraste |
| meas.inst. | comparative test | prueba de referencia |