mensuration vs measuring

mensuration and measuring both are nouns.

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

As nouns, mensuration and measuring are synonyms defined as:

mensuration and measuring: the act or process of assigning numbers to phenomena according to a rule

Other synonyms of mensuration include measure, measurement.

mensuration (noun)	measuring (noun)
the act or process of assigning numbers to phenomena according to a rule	the act or process of assigning numbers to phenomena according to a rule