Synonyms of crowded

1 Syllable
sro, clean, chock, thick, tight, big, full
2 Syllables
jellied, tightest, bigger, cramped, chocker, thickset, biggest, brimful, thronged, loaded, gloppy, fuller, skintight, compact, packed, dense, awash, crammed, densest, jammed, brimming, chock-full, stuffed, serried, many, crushed, jam-full, fullest, swarming, massed, huddled, mobbed, close, teeming, denser, buller, tighter
3 Syllables
sardined, replete, appressed, close-knit, wall-to-wall, congested, jam-packed, cluttered, vitrified, two-by-four, stuffed-up, compacting, stoppered, populous, infested, overfull
4 Syllables
well-provided, close-fitting, large-scale, overfilled, overflowing
5 Syllables
elbow-to-elbow
6 Syllables
overpopulated