anthill

OXFORD DICTIONARY

anthill, n.
1 a moundlike nest built by ants or termites.
2 a community teeming with people.

THESAURUS

anthill

bank, barrow, brae, butte, cock, down, drift, drumlin, dune, embankment, fell, foothills, haycock, haymow, hayrick, haystack, heap, hill, hillock, hummock, knob, knoll, molehill, monticle, monticule, moor, mound, mow, pile, pyramid, rick, sand dune, snowdrift, stack, swell