spirometry vs mensuration

spirometry and mensuration both are nouns.

Word	Noun	Adjective	Verb	Adverb
spirometry	Yes	No	No	No
mensuration	Yes	No	No	No

As nouns, mensuration is a hypernym of spirometry; that is, mensuration is a word with a broader meaning than spirometry:

spirometry: the use of a spirometer to measure vital capacity
mensuration: the act or process of assigning numbers to phenomena according to a rule

Other hypernyms of spirometry include measure, measurement, measuring.

spirometry (noun)	mensuration (noun)
the use of a spirometer to measure vital capacity	the act or process of assigning numbers to phenomena according to a rule