The Collaborative International Dictionary of English v.0.48:

Deliberately \De*lib"er*ate*ly\, adv.
   With careful consideration, or deliberation; circumspectly;
   warily; not hastily or rashly; slowly; as, a purpose
   deliberately formed.
   [1913 Webster]

WordNet (r) 3.0 (2006):

deliberately
    adv 1: with intention; in an intentional manner; "he used that
           word intentionally"; "I did this by choice" [syn:
           intentionally, deliberately, designedly, on
           purpose, purposely, advisedly, by choice, by
           design] [ant: accidentally, by chance,
           circumstantially, unexpectedly, unintentionally]
    2: in a deliberate unhurried manner; "she was working
       deliberately" [syn: measuredly, deliberately]

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "deliberately":
   advisedly, by design, calculatedly, calculatingly, cautiously,
   circumspectly, consciously, contemplatedly, crawlingly, creepingly,
   designedly, dilatorily, easily, falteringly, gently, haltingly,
   idly, in cold blood, in low gear, in march time, in slow motion,
   in slow tempo, indolently, intentionally, knowingly,
   lackadaisically, languidly, languorously, leisurely, limpingly,
   lingeringly, loiteringly, meditatedly, moderately, on purpose,
   pointedly, pokily, pokingly, premeditatedly, purposefully,
   purposely, purposively, relaxedly, reluctantly, resolutely, slow,
   slowly, sluggishly, tardily, tarryingly, tentatively,
   under easy sail, unhurriedly, voluntarily, willfully,
   with agonizing slowness, with deliberation, with full intent,
   with intent, with malice aforethought, with purpose, wittingly