The Collaborative International Dictionary of English v.0.48:

Countermove \Coun`ter*move"\ (koun`t?r-m??v"), v. t. & i.
   To move in a contrary direction to.
   [1913 Webster] Countermove

The Collaborative International Dictionary of English v.0.48:

Countermove \Coun"ter*move`\ (-m??v`), n. Countermovement
\Coun"ter*move`ment\ (-ment).
   A movement in opposition to another.
   [1913 Webster]

WordNet (r) 3.0 (2006):

countermove
    n 1: an attack by a defending force against an attacking enemy
         force in order to regain lost ground or cut off enemy
         advance units etc. [syn: counterattack, countermove]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "countermove":
   action, ad hoc measure, answer, artifice, contrivance, coup,
   course of action, demarche, device, dodge, effort, expedient,
   gimmick, improvisation, jury-rig, jury-rigged expedient,
   last expedient, last resort, last shift, makeshift, maneuver,
   means, measure, move, pis aller, resort, resource, shake-up, shift,
   solution, step, stopgap, stratagem, stroke, stroke of policy,
   tactic, temporary expedient, trick, trump, working hypothesis,
   working proposition