Definition of army :
1. A body of persons organized for the advancement of a cause; as, the Blue Ribbon Army.
2. A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper officers.
3. A great number; a vast multitude; a host.
fighting, the armed forces, crush, rout, clinic, flash mob, panel, airborne, police, ground forces, in the army, commission, horde, committee, troops, scrum, veteran, martial, commando, the Coast Guard, regimented, association, support group, drafted, mass, ruck, regimental, class, legion, guerrilla, volunteered, ground, the States, legions, armament, corps, air force, cavalry, combat, cram, soldiers, under orders, bike, the artillery, soldiery, cloud, military, press, in service, command, big, belligerent, under arms, air power, board, array, organization, consortium, score, throng, regular army, flash mobbing, militant, land, air, swarm, C in C, forces, multitude
crew (part of speech: noun)
covey, herd, force, detail, division, troop, posse, fellowship, circle, retinue, litter, flock, fleet, cabal, colony, wing, battalion, coterie, bevy, detachment, fraternity, group, sect, team, cell, society, crowd, union, collection, assembly, outfit, party, pack, junta, coalition, school, clan, regiment, nest, platoon, hive, phalanx, assemblage, set, string, complement, gang, tribe, crew, league, faction, brigade, ring, staff, host, caucus, aggregation, bunch, drove, mob, body, troupe, cadre, club, clique, band, squad, company