The Collaborative International Dictionary of English v.0.48:

Scrutiny \Scru"ti*ny\, n. [L. scrutinium, fr. scrutari to search
   carefully, originally, to search even to the rags, fr. scruta
   trash, trumpery; perhaps akin to E. shred: cf. AS. scrudnian
   to make scrutiny.]
   1. Close examination; minute inspection; critical
      observation.
      [1913 Webster]

            They that have designed exactness and deep scrutiny
            have taken some one part of nature.   --Sir M. Hale.
      [1913 Webster]

            Thenceforth I thought thee worth my nearer view
            And narrower scrutiny.                --Milton.
      [1913 Webster]

   2. (Anc. Church) An examination of catechumens, in the last
      week of Lent, who were to receive baptism on Easter Day.
      [1913 Webster]

   3. (Canon Law) A ticket, or little paper billet, on which a
      vote is written.
      [1913 Webster]

   4. (Parliamentary Practice) An examination by a committee of
      the votes given at an election, for the purpose of
      correcting the poll. --Brande & C.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scrutiny \Scru"ti*ny\, v. t.
   To scrutinize. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

scrutiny
    n 1: the act of examining something closely (as for mistakes)
         [syn: examination, scrutiny]
    2: a prolonged intense look

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "scrutiny":
   analysis, attention to detail, audit, check, close study,
   contemplation, eagle eye, enquiry, examination, exploration, eye,
   eyeball inspection, fascinated attention, finicalness, finickiness,
   fixed regard, harping, inquiry, inspection, investigation, look-in,
   meticulous attention, minute attention, ocular inspection,
   overhaul, overhauling, overview, perlustration, perusal, probe,
   probing, quality control, rapt attention, review, run-through,
   scan, sifting, special consideration, strict attention, study,
   surveillance, survey, tab, the eye, undivided attention,
   unrelenting attention, vetting, view, visitation,
   visual examination, watch