Participation (noun): The fact of taking part, as in some action or attempt: participation in a celebration.
Diversity: The state or fact of being diverse; difference; unlikeness.
Idiom: (noun): An expression whose meaning is not predictable from the usual meanings of its constituent elements, as kick the bucket or hang one's head
Paraphrase(noun): A restatement of a text or passage giving the meaning in another form, as for clearness; rewording.
