The Collaborative International Dictionary of English v.0.48:

Particularization \Par*tic`u*lar*i*za"tion\, n.
   The act of particularizing. --Coleridge.
   [1913 Webster]

WordNet (r) 3.0 (2006):

particularization
    n 1: an individualized description of a particular instance
         [syn: particularization, particularisation,
         detailing]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "particularization":
   Baconian method, a fortiori reasoning, a posteriori reasoning,
   a priori reasoning, alteration, analysis, anatomization,
   atomization, cameo, catalog, cataloging, change, character,
   character sketch, characterization, circumstantiation, deduction,
   deductive reasoning, delineation, demarcation, depiction,
   description, desynonymization, details, differencing,
   differentiation, discrimination, disequalization, disjunction,
   distinction, distinguishment, diversification, division, epagoge,
   evocation, generalization, graphic account,
   hypothesis and verification, image, imagery, impression,
   individualization, individuation, induction, inductive reasoning,
   inference, itemization, limning, localization, modification,
   peculiarization, personalization, philosophical induction,
   photograph, picture, portrait, portraiture, portrayal, profile,
   rendering, rendition, representation, segregation, separation,
   severalization, severance, sketch, specialization, specification,
   syllogism, syllogistic reasoning, synthesis, variation, vignette,
   vivid description, word painting