Measurement
Part of speech: noun
Definition: The act of measuring. Magnitude (or extent or amount) determined by measurement.
Example sentence: I've kind of stopped valuing laughter as the end-all measurement of what I'm doing.
Measuring
Part of speech: verb
Definition: To ascertain the quantity of a unit of material via calculated comparison with respect to a standard.
Example sentence: Because I am interested in the growth and development of early hominids, I play with my kids, you know, looking at their teeth or measuring their heads, which they like also, because it's kind of fun.