v. 1 agitate, stir (up), discompose, discomfit, discomfort, disconcert, shake (up), upset, disquiet, discommode, bother, put out or off, disturb, perturb, flurry, flutter, make nervous, throw off, distract, confuse, baffle, confound, puzzle, perplex, befuddle, bewilder, daze, dazzle, Colloq rattle, throw, discombobulate, hassle, faze Don't be flustered by her rude manner
n. 2 agitation, upset, discomfort, disquiet, bother, disturbance, commotion, perturbation, dither, flurry, flutter, nervousness, distraction, confusion, bafflement, befuddlement, perplexity, bewilderment All this fluster came about through the absence of a coherent plan