WordNet (r) 3.0 (2006):

anemic
    adj 1: lacking vigor or energy; "an anemic attempt to hit the
           baseball" [syn: anemic, anaemic]
    2: relating to anemia or suffering from anemia [syn: anemic,
       anaemic]

Moby Thesaurus II by Grady Ward, 1.0:

135 Moby Thesaurus words for "anemic":
   achromatic, achromic, allergic, apoplectic, arthritic, ashen, ashy,
   asthenic, bilious, bled white, bloodless, cadaverous, cancerous,
   chicken, chloranemic, chlorotic, colicky, colorless, consumptive,
   cowardly, dead, deadly pale, deathly pale, debilitated, dim,
   dimmed, dingy, discolored, drooping, droopy, dropsical, dull,
   dyspeptic, edematous, effete, encephalitic, epileptic, etiolated,
   exsanguinated, exsanguine, exsanguineous, faded, faint, faintish,
   fallow, feeble, flabby, flaccid, flat, floppy, ghastly, gone, gray,
   gutless, haggard, hueless, hypochromic, imbecile, impotent,
   lackluster, languid, languorous, laryngitic, leaden, leprous,
   limber, limp, listless, livid, luetic, lurid, lusterless, lustless,
   malarial, malignant, marrowless, mat, mealy, measly, muddy,
   nephritic, nerveless, neuralgic, neuritic, neutral, pale,
   pale as death, pale-faced, pallid, palsied, paralytic, pasty,
   phthisic, pithless, pleuritic, pneumonic, pocky, podagric, pooped,
   powerless, rachitic, rheumatic, rickety, rubbery, sallow, sapless,
   scorbutic, scrofulous, sickly, sinewless, slack, soft, spineless,
   strengthless, tabetic, tabid, tallow-faced, toneless, tubercular,
   tuberculous, tumorigenic, tumorous, uncolored, unhardened,
   unnerved, unstrung, wan, washed-out, waterish, watery, waxen, weak,
   weakly, whey-faced, white