Source : Webster's Revised Unabridged Dictionary (1913)

Unitize \U"nit*ize\, v. t. [imp. & p. p. {Unitized}; p. pr. &
   vb. n. {Unitizing}.]
   To reduce to a unit, or one whole; to form into a unit; to
   unify.

Source : WordNet®

unitize
     v 1: divide (bulk material) and process as units [syn: {unitise}]
     2: make into a unit; "unitize a car body" [syn: {unitise}]
     3: separate or classify into units; "The hospital was unitized
        for efficiency" [syn: {unitise}]