severalize

from WordNet (r) 3.0 (2006)

severalize
    v 1: distinguish or separate [syn: {severalize}, {severalise}]
    2: mark as different; "We distinguish several kinds of maple"
       [syn: {distinguish}, {separate}, {differentiate}, {secern},
       {secernate}, {severalize}, {severalise}, {tell}, {tell
       apart}]

from The Collaborative International Dictionary of English v.0.48

Severalize \Sev"er*al*ize\, v. t.
   To distinguish. [Obs.]
   [1913 Webster]