The Collaborative International Dictionary of English v.0.48:

Realistic \Re`al*is"tic\ (-[i^]s"t[i^]k), a.
   Of or pertaining to the realists; in the manner of the
   realists; characterized by realism rather than by
   imagination.
   [1913 Webster]

WordNet (r) 3.0 (2006):

realistic
    adj 1: aware or expressing awareness of things as they really
           are; "a realistic description"; "a realistic view of the
           possibilities"; "a realistic appraisal of our chances";
           "the actors tried to create a realistic portrayal of the
           Africans" [ant: unrealistic]
    2: representing what is real; not abstract or ideal; "realistic
       portraiture"; "a realistic novel"; "in naturalistic colors";
       "the school of naturalistic writers" [syn: naturalistic,
       realistic]
    3: of or relating to the philosophical doctrine of realism; "a
       realistic system of thought"

Moby Thesaurus II by Grady Ward, 1.0:

200 Moby Thesaurus words for "realistic":
   Cyrenaic, Eleatic, Epicurean, Marxian, Marxist, Megarian, Stoic,
   animist, animistic, astute, atomistic, authentic, banausic,
   bona fide, breadwinning, breathing, businesslike, candid,
   card-carrying, characteristic, commercial, commonsense,
   cosmotheistic, delineative, depictive, descriptive, dinkum,
   distinctive, distinguishing, down-to-earth, earthy, eclectic,
   empirical, eudaemonistic, exemplary, existential, expositive,
   expressive, faithful, following the letter, general, genuine, good,
   graphic, hard, hard-boiled, hard-nosed, hardheaded, hedonic,
   hedonist, hedonistic, hoaxproof, honest, honest-to-God, humanist,
   humanistic, hylomorphous, hylotheistic, idealistic, inartificial,
   instrumentalist, lawful, legitimate, level-headed, lifelike,
   literal, living, materialist, materialistic, matter-of-fact,
   mechanist, mechanistic, metaphysical, moneymaking, monistic,
   natural, naturalist, naturalistic, naturistic, no-nonsense,
   nominalist, normal, not born yesterday, orderly, original,
   panlogistical, pantheistic, positivist, positivistic, practical,
   practical-minded, pragmatic, pragmatical, pragmatist, prosaic,
   prudent, pure, quintessential, rational, rationalistic, real,
   realist, reasonable, regular, representative, rightful, sample,
   sane, scholastic, scientific, scientistic, secular,
   sensationalistic, sensible, shrewd, simon-pure, simple, sincere,
   sober, sober-minded, sophisticated, sound, sound-thinking,
   speaking, sterling, straight-thinking, sure-enough, syncretistic,
   theistic, to the life, tough, tough-minded, transcendentalist,
   transcendentalistic, true to form, true to life, true to nature,
   true to reality, true to type, typal, typic, typical,
   unadulterated, unaffected, unassumed, unassuming, uncolored,
   unconcocted, uncopied, uncounterfeited, uncullible, undeceivable,
   undeludable, undisguised, undisguising, undistorted, undupable,
   unexaggerated, unexceptional, unfabricated, unfanciful, unfeigned,
   unfeigning, unfictitious, unflattering, unfoolable, ungullible,
   unhoaxable, unideal, unidealistic, unimagined, unimitated,
   uninvented, unpretended, unpretending, unqualified, unromantic,
   unseduceable, unsentimental, unsimulated, unspecious, unsynthetic,
   unvarnished, usual, utilitarian, verbal, verbatim, veridical,
   verisimilar, vitalistic, vivid, voluntarist, voluntaristic,
   well-drawn, wise, word-for-word, workaday, workday, working,
   worldly