The Collaborative International Dictionary of English v.0.48:

commercialise \commercialise\ n.
   same as commercialize. [Brit.]
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

commercialize \commercialize\ n.
   to make something commercial in character, either by placing
   it for sale on the open market, or by emphasizing its
   profit-making aspects; as, the Olympics have been excessively
   commercialized. [Also spelled commercialise.]
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

commercialise
    v 1: make commercial; "Some Amish people have commercialized
         their way of life" [syn: commercialize, commercialise,
         market]