agitating, ailing, alarming(also alaruming), bothering, concerning, derailing, discomforting, discomposing, dismaying, disquieting, distempering, distracting, distressing, disturbing, exercising, flurrying, frazzling, freaking (out), fussing, perturbing, undoing, unhinging, unsettling, upsetting, weirding out, worrying

aggravating, angering, annoying, bugging, chafing, chivying(or chivvying), exasperating, fretting, galling, getting, grating, harassing, harrying, irking, irritating, nettling, peeving, pestering, piquing, putting off, putting out, riling, vexingbedeviling, haunting, plaguingabashing, confounding, confusing, discomfiting, disconcerting, discountenancing, embarrassing, fazing, flustering, jarring, mortifying, nonplussing(also nonplusing), rattling, shaking updaunting, demoralizing, discouraging, disheartening, dispiriting, unnerving

calming, composing, quieting, settling, soothing, tranquilizing(also tranquillizing)

allaying, alleviating, assuagingappeasing, conciliating, mollifying, pacifying, placating, propitiating