The Collaborative International Dictionary of English v.0.48:

Sycophancy \Syc"o*phan*cy\, n. [Cf. L. sycophantia deceit, Gr. ?
   false accusation.]
   The character or characteristic of a sycophant. Hence:
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   (a) False accusation; calumniation; talebearing. [Obs.] --Bp.
       Hall.
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   (b) Obsequious flattery; servility.
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             The sycophancy of A.Philips had prejudiced Mr.
             Addison against Pope.                --Bp.
                                                  Warburton.
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WordNet (r) 3.0 (2006):

sycophancy
    n 1: fawning obsequiousness