Synonyms and related words :
aggravation, annoyance, bad news, bedevilment, bore, bother, botheration, bothersomeness, chase, chasing, crashing bore, devilment, difficulty, downer, drag, exasperation, follow, follow-up, following, harassment, harrying, headache, heeling, hounding, hue and cry, hunting, molestation, nuisance, persecution, pest, problem, prosecution, pursual, pursuance, pursuing, pursuit, quest, searching, seeking, sequel, sequence, series, shadowing, stalking, tailing, tracking, tracking down, trailing, trial, trouble, vexation, vexatiousness, worriment, worry,