aggravation, agitation, amplification, animation, annoyance, annoyingness, arousal, arousing, augmentation, bad news, bedevilment, besetment, bore, bother, botheration, bothersomeness, contentiousness, crashing bore, deepening, deliberate aggravation, deterioration, devilment, difficulty, disapprobation, disapproval, discontent, displeasure, dissatisfaction, dogging, downer, drag, electrification, embittering, embitterment, enhancement, enlargement, exacerbation, excitation, excitement, exhilaration, firing, fomentation, galvanization, harassment, harrying, headache, heightening, hounding, incitation, incitement, increase, inflammation, infuriation, instigation, intensification, irksomeness, irritant, irritation, lathering up, magnification, molestation, nuisance, pep rally, pep talk, persecution, perturbation, peskiness, pest, pester, pestiferousness, plague, plaguesomeness, pother, problem, provocation, provokingness, rabble-rousing, resentfulness, resentment, sharpening, souring, steaming up, stimulation, stimulus, stirring, stirring up, stirring-up, tiresomeness, trial, trouble, troublesomeness, vexation, vexatiousness, wearisomeness, whipping up, working up, worriment, worrisomeness, worry, worsening