variance vs activity

variance and activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
variance	Yes	No	No	No
activity	Yes	No	No	No

As nouns, activity is a hypernym of variance; that is, activity is a word with a broader meaning than variance:

variance (noun)	activity (noun)
an activity that varies from a norm or standard	any specific behavior
an official dispensation to act contrary to a rule or regulation (typically a building regulation)	the trait of being active; moving or acting rapidly and energetically
a difference between conflicting facts or claims or opinions	an organic process that takes place in the body
the quality of being subject to variation	a process existing in or produced by nature (rather than by the intent of human beings)
the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value	the state of being active
discord that splits a group	(chemistry) the capacity of a substance to take part in a chemical reaction
an event that departs from expectations