noun

a large number of people gathered together in a disorganized or unruly way.

a huge crowd gathered in the street outside

throng,horde,mob,rabble,large number,mass,multitude,host,army,herd,flock,drove,swarm,sea,stream,troupe,pack,press,crush,flood,collection,company,gathering,assembly,assemblage,array,congregation,convention,concourse,gaggle,shower,rout

verb

(of a number of people) fill (a space) almost completely, leaving little or no room for movement.

the dance floor was crowded with revellers

throng,pack,jam,cram,fill,overfill,congest,pervade,occupy all of,packed,congested,crushed,cramped,overcrowded,full,filled to capacity,full to bursting,overfull,overflowing,teeming,swarming,thronged,populous,overpopulated,overpeopled,busy,mobbed,stuffed,jam-packed,chock-a-block,chock-full,bursting at the seams,bulging at the seams,full to the gunwales,wall-to-wall,heaving,chocker