preparation vs activity

preparation and activity both are nouns.

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

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

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

preparation: the activity of putting or setting in order in advance of some act or purpose
activity: any specific behavior

preparation (noun)	activity (noun)
activity leading to skilled behavior	any specific behavior
preparatory school work done outside school (especially at home)	the trait of being active; moving or acting rapidly and energetically
the activity of putting or setting in order in advance of some act or purpose	an organic process that takes place in the body
the act of preparing something (as food) by the application of heat	a process existing in or produced by nature (rather than by the intent of human beings)
the cognitive process of thinking about what you will do in the event of something happening	the state of being active
(music) a note that produces a dissonant chord is first heard in a consonant chord	(chemistry) the capacity of a substance to take part in a chemical reaction
the state of having been made ready or prepared for use or action (especially military action)
a substance prepared according to a formula