alarm, bother, cause anxiety to, concern, discombobulate, disconcert, disquiet, distress, disturb, faze, flurry, fluster, incite, inflame, make anxious, perturb, provoke, rattle, ruffle, stir up, trouble, unnerve, unsettle, upset, work up, and worry.
beat, blend, churn, disturb, fold, jolt, roil, shake, stir, toss, whip (up), and whisk.
argue, battle, campaign, crusade, debate, dispute, fight, press, push, strive, struggle, and wrangle.