The Collaborative International Dictionary of English v.0.48:

Comparable \Com"pa*ra*ble\, a. [L. comparabilis: cf. F.
   comparable.]
   Capable of being compared; worthy of comparison.
   [1913 Webster]

         There is no blessing of life comparable to the
         enjoyment of a discreet and virtuous friend. --Addison.
   -- Com"pa*ra*ble*ness, n. -- Com"pa*ra*bly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

comparably
    adv 1: in a comparable manner or to a comparable degree; "you
           will have to work comparably harder" [ant:
           incomparably, uncomparably]