WordNet (r) 3.0 (2006):

scores
    n 1: a large number or amount; "made lots of new friends"; "she
         amassed stacks of newspapers" [syn: tons, dozens,
         heaps, lots, piles, scores, stacks, loads,
         rafts, slews, wads, oodles, gobs, scads,
         lashings]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "scores":
   a mass of, a world of, army, bevy, bunch, cloud, clutter, covey,
   flight, flock, flocks, hail, hive, host, jam, large amount, legion,
   lots, many, masses of, mob, muchness, multitude, nest, numbers,
   pack, plurality, quantities, quite a few, rout, ruck, shoal, swarm,
   throng, tidy sum, worlds of