Synonyms of disturbing

1 Syllable
hard, harsh, trying
2 Syllables
harshest, creepier, vexing, teasing, harsher, annoying, carking, stressful, scratchy, creepy, poignant, worrying, ribbing, seamy, plaguy, rankling, seamier, painful, pesky, squawky, grievous, troubling, dismaying, taxing, startling, scratchier, gloomy
3 Syllables
tormenting, perplexing, disquieting, provoking, irksome, confusions, onerous, unpleasant, mistimed, daedalean, ominous, harrowing, toilsome, difficult, horrendous, upsetting, vexatious, threatening, depressing, alarming, terrible, impeding, severe, unsettling, sinister, out-of-key, out-of-tune, tuneless, laborious, untoward, distressing, frightening, perturbing, prophetic, harassing, confusion, uncertain
4 Syllables
disagreeable, burdensome, bothersome, troublesome, aggravating, tiresome, foreboding, aggressive, pessimistic, detrimental, irritating, agitating, discouraging, troublemaking, embarrassing, consequential, agonizing, disruptive, disconcerting, worrisome, discommoding, discomposing, discomforting, wearisome, incommodious, inconvenient, nettlesome, discommodious, unmelodious
5 Syllables
importunate, inopportune, agitative, rebarbative, provocative
6 Syllables
unsatisfactory