complaint, 
objection, gripe (informal), remonstration, dissent, dispute, disapproval 
demonstration, 
march, rally, campaign, dispute, picket, strike, walkout, work to rule 
  
complain, 
object, gripe (informal), remonstrate, dissent, dispute, voice disapproval, moan 
(informal), make an objection, oppose 
declare, 
affirm, assert, insist, claim, announce, avow (formal)