Synonyms of irritant

1 Syllable
pest
2 Syllables
gadflies, trouble, stressors, pollen, ragweed, pollens, bothers, stressor, gadfly, bother, burden
3 Syllables
besetment, botherment, badgerer, pesterer, allergen, tormentors, tormentor, allergens, nuisance
4 Syllables
repugnancy, repellence, aggravation, repellency
5 Syllables
exasperations, exasperation