actinometry vs measurement

actinometry and measurement both are nouns.

Word	Noun	Adjective	Verb	Adverb
actinometry	Yes	No	No	No
measurement	Yes	No	No	No

As nouns, measurement is a hypernym of actinometry; that is, measurement is a word with a broader meaning than actinometry:

actinometry: measuring the intensity of electromagnetic radiation (especially of the sun's rays)
measurement: the act or process of assigning numbers to phenomena according to a rule

Other hypernyms of actinometry include measure, measuring, mensuration.

actinometry (noun)	measurement (noun)
measuring the intensity of electromagnetic radiation (especially of the sun's rays)	the act or process of assigning numbers to phenomena according to a rule