irritating (adj.)
- acerbic
- acid
- acrid
- aggravating
- annoying
- astringent
- biting
- bitter
- bothersome
- caustic
- contentious
- cutting
- disturbing
- exasperating
- galling
- grating
- harsh
- importunate
- irksome
- irritative
- keen
- mordant
- penetrating
- pesky
- pestering
- pestiferous
- pestilent
- pestilential
- piercing
- piquant
- plaguey
- poignant
- provocative
- provoking
- pungent
- rasping
- rough
- scratchy
- severe
- sharp
- sour
- stinging
- teasing
- tiresome
- trenchant
- troublesome
- troubling
- vexatious
- vexing
- vitriolic
- wearisome
- worrisome
- worrying
