Na["i]f

from The Collaborative International Dictionary of English v.0.48

Naif \Na"["i]f`\ (?; formerly ?), a. [F. na["i]f. See
   {Na["i]ve}.]
   1. Having a true natural luster without being cut; -- applied
      by jewelers to a precious stone.
      [1913 Webster]

   2. Na["i]ve; as, a na["i]f remark. --London Spectator.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

50 Moby Thesaurus words for "naif":
      babe, boob, child, child of nature, chump, cinch, credulous person,
      cull, dove, dupe, easy mark, easy pickings, fall guy, fish, fool,
      gobe-mouches, greener, greenhorn, greeny, gudgeon, gull, hick,
      infant, ingenue, innocent, lamb, leadpipe cinch, lout, mere child,
      monkey, noble savage, oaf, patsy, pigeon, plaything, prize sap,
      pushover, rube, sap, saphead, schlemiel, simple soul, sitting duck,
      stooge, sucker, toy, trusting soul, unsophisticate, victim,
      yokel

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