The Collaborative International Dictionary of English v.0.48:

Compulsively \Com*pul"sive*ly\, adv.
   By compulsion; by force.
   [1913 Webster]

WordNet (r) 3.0 (2006):

compulsively
    adv 1: in a compulsive manner; "he cleaned his shoes
           compulsively after every walk" [syn: compulsively,
           obsessively, obsessionally]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "compulsively":
   anally, automatically, blindly, by reflex, compellingly,
   complaisantly, compliantly, compulsorily, conformably,
   conformingly, conventionally, flexibly, imperatively, imperiously,
   instinctively, involuntarily, malleably, mechanically, obediently,
   pedantically, pliantly, reflexively, submissively, traditionally,
   unconsciously, unintentionally, unthinkingly, unwillingly,
   unwittingly, yieldingly