The Collaborative International Dictionary of English v.0.48:

Retrocede \Re"tro*cede\, v. t. [Pref. retro- + cede: cf. F.
   r['e]troc['e]der.]
   To cede or grant back; as, to retrocede a territory to a
   former proprietor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Retrocede \Re"tro*cede\, v. i. [L. retrocedere; retro backward,
   back + cedere to go. See Cede.]
   To go back.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "retrocede":
   back, backslide, cock, decline, die away, diminish, drift away,
   dwindle, ebb, fade, fade away, fall astern, fall back, fall behind,
   get behind, go, go away, go backwards, go behind, jerk back, lapse,
   lapse back, lose ground, move away, move off, pull away, pull back,
   recede, recidivate, regress, relapse, retire, retract, retreat,
   retroflex, retrograde, retrogress, retrovert, return, reverse,
   revert, shrink, sink, slip back, stand off, wane,
   widen the distance, withdraw