The correct answer is- 'Measurement' Key Points - let's look at the meaning of the given word and the correct answer. - Mensuration (noun): the study of shapes and their area, volume, etc.. - Example: Eight conclusions on the signs of mensuration 20. - Measurement(noun): the act or process of measuring. - Example: The test is based on the measurement of blood levels. Hence, the word Measurement is the most appropriate synonym for Mensuration.