troop or troupe?
Both these words can be used as nouns denoting a group of people. Troop is more general, being applied to any large group, and specifically to a military unit. Troupe is applied only to a group of actors, circus people, or other entertainers. The verb meaning "to move or gather together as a large orderly group" is spelled troop, not troupe: The reporters trooped in to speak to the President.
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