The Collaborative International Dictionary of English v.0.48:

Evenly \E"ven*ly\, adv.
   With an even, level, or smooth surface; without roughness,
   elevations, or depression; uniformly; equally; comfortably;
   impartially; serenely.
   [1913 Webster]

WordNet (r) 3.0 (2006):

evenly
    adv 1: in equal amounts or shares; in a balanced or impartial
           way; "a class evenly divided between girls and boys";
           "they split their winnings equally"; "deal equally with
           rich and poor" [syn: evenly, equally] [ant:
           unequally, unevenly]
    2: in a level and regular way [ant: unevenly]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "evenly":
   ad eundem, as, as well, at full length, calmly, ceteris paribus,
   composedly, conservatively, coolly, correspondingly, deservedly,
   disinterestedly, dispassionately, dully, duly, equably, equally,
   equitably, equivalently, fair, fairly, fifty-fifty, flat, flatly,
   flatways, flatwise, flush, horizontally, identically, impartially,
   impersonally, in a rut, in balance, in moderation, in reason,
   indifferently, judiciously, justifiably, justifiedly, justly,
   lengthways, lengthwise, level, like clockwork, meetly, moderately,
   monotonously, on a level, on wheels, properly, proportionately,
   prudently, regularly, restrainedly, rightfully, rightly, routinely,
   serenely, smooth, smoothly, so, soberly, soothingly, squarely,
   steadily, subduedly, tediously, temperately, tranquilly, uniformly,
   unrelievedly, upon even terms, warrantably, warrantedly,
   within bounds, within compass, within reason,
   without distinction