agolparse

To crowd or press together suddenly, usually at a single point — often stronger and more sudden than aglomerarse: la gente se agolpó en la salida de emergencia. Also common figuratively for thoughts or memories rushing in all at once: los recuerdos se le agolparon.

• Los curiosos se agolparon frente al edificio. — Onlookers crowded in front of the building.
• Las lágrimas se le agolparon en los ojos. — Tears welled up suddenly in her eyes.
• Los recuerdos se agolparon en su mente. — Memories came flooding into his mind all at once.

Treating agolparse as a plain synonym of aglomerarse — agolparse implies a sudden, often urgent rush to one point (a crowd surging, tears welling up), while aglomerarse describes a denser but more gradual buildup.

Often confused with aglomerarse.