weigh-in vs mensuration

weigh-in and mensuration both are nouns.

Word	Noun	Adjective	Verb	Adverb
weigh-in	Yes	No	No	No
mensuration	Yes	No	No	No

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

weigh-in: The process of determining a competitor's body weight prior to an event, especially to ensure it is within the weight restrictions
mensuration: the act or process of assigning numbers to phenomena according to a rule

Other hypernyms of weigh-in include measure, measurement, measuring.

weigh-in (noun)	mensuration (noun)
The process of determining a competitor's body weight prior to an event, especially to ensure it is within the weight restrictions	the act or process of assigning numbers to phenomena according to a rule