Flock
Part of speech: verb
Definition: To congregate in or head towards a place in large numbers. To coat a surface with dense fibers or particles.
Part of speech: noun
Definition: A large number of birds, especially those gathered together for the purpose of migration. A large number of animals, especially sheep or goats kept together. Those served by a particular pastor or shepherd A large number of people Coarse tufts of wool or cotton used in bedding
Example sentence: As people flock to urban centers where ground space is limited, cities with green walls and roofs and skyscraper farms offer improved health and well-being, renewable resources, reliable food supply, and relief to the environment.
Troop
Part of speech: verb
Definition: To move in numbers; to come or gather in crowds or troops.To march on; to go forward in haste.to move or march as if in a crowd; “The children trooped into the room”.
Part of speech: noun
Definition: A collection of people; a company; a number; a multitude.A small unit of cavalry or armour commanded by a captain, corresponding to a platoon or company of infantry.A detachment of soldiers or police, especially horse artillery, armour, or state troopers.Soldiers, military forces (usually "troops").A company of stageplayers; a troupe.A particular roll of the druma unit of girl or boy scoutsan orderly crowd