lightless (adjective) dark: lack of light
Sinonime: SRO, awash, brimful, brimming, chock-full,
clean,
close,
compact, crammed, cramped, crushed,
dense, elbow-to-elbow, filled to the rafters, fit to bust, full, full house, full up, huddled, jam-packed, jammed,
loaded, lousy with, massed, mob scene, mobbed, overflowing,
packed, populous, sardined, sold out, standing room only, stiff with, stuffed, swarming,
teeming,
thick, thickset, thronged,
tight, topped off, up to here, up to the hilt, wall-to-wall
Antonime: empty, uncongested, uncrowded, unfilled