The Collaborative International Dictionary of English v.0.48:

Systematize \Sys"tem*a*tize\, v. t. [imp. & p. p.
   Systematized; p. pr. & vb. n. Systematizing.] [Cf. F.
   syst['e]matiser. Cf. Systemize.]
   To reduce to system or regular method; to arrange
   methodically; to methodize; as, to systematize a collection
   of plants or minerals; to systematize one's work; to
   systematize one's ideas.
   [1913 Webster]

         Diseases were healed, and buildings erected, before
         medicine and architecture were systematized into arts.
                                                  --Harris.
   [1913 Webster]

WordNet (r) 3.0 (2006):

systematize
    v 1: arrange according to a system or reduce to a system;
         "systematize our scientific knowledge" [syn: systematize,
         systematise, systemize, systemise]

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "systematize":
   adjust, arrange, array, calculate, cast, chart, codify, concert,
   contrive, cool off, coordinate, cut out, deploy, design, devise,
   dispose, figure, fix, forecast, form, frame, grade, harmonize,
   hierarchize, intend, lay out, lay plans, line up,
   make a projection, make arrangements, marshal, methodize,
   normalize, order, organize, pacify, plan, plan ahead, prearrange,
   program, project, quiet, rank, rationalize, regularize, regulate,
   routinize, schedule, schematize, set up, settle, shape,
   standardize, structure, synchronize, tranquilize, tune, tune up,
   work out, work up