WordNet (r) 3.0 (2006):

mini
    adj 1: used of women's clothing; very short with hemline above
           the knee; "a mini dress"; "miniskirts" [ant: maxi,
           midi]
    n 1: a very short skirt [syn: miniskirt, mini]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "mini":
   Elzevir, baby, bantam, banty, button, chit, diminutive, doll,
   duodecimo, featherweight, fingerling, lightweight, microcosm,
   miniature, minikin, minnow, minny, mouse, nubbin, peewee, pony,
   puppet, runt, shrimp, slip, small fry, snip, snippet, subminiature,
   tit, twelvemo, wart, wisp