demurring, excepting, expostulating, kicking, objecting, protesting

caviling(or cavilling), quibblingchallenging, daring, defying, fightingconflicting, debating, disputing, hassling, quarreling(or quarrelling), squabbling, wranglingbeefing, bellyaching, bitching, bleating, carping, caterwauling, complaining, crabbing, croaking, fussing, griping, grizzling, grouching, grousing, growling, grumbling, grumping, hollering, keening, maundering(chiefly British), moaning, murmuring, muttering, nagging, repining, screaming, squawking, squealing, wailing, whimpering, whinging(or whingeing, British), whining, yammering, yawping(or yauping), yowlingbalking, gagging, stickingcensuring, criticizing, denouncingdisobeying, rebelling, withstandingdemonstrating

taking exception, taking issue

approving, sanctioningacceptingacceding, acquiescing, agreeing, assentingadhering, complying, conforming, following, minding, obeying, observingadvocating, championing, defending, maintaining, supporting, sustaining, upholdingapplauding, cheering, commending