Acerbation is a word that describes the act of irritating or provoking feelings of annoyance or anger. It is sometimes used interchangeably with the word aggravation. However, if you're looking for synonyms that can provide a more nuanced description of the feeling, you might consider words like exasperation, irritation, vexation, or annoyance. These terms suggest a heightened sense of frustration that can often lead to conflict or tension. On the other hand, if you're looking for words that describe a less intense feeling of annoyance or slight irritation, you might consider using terms like bother, irk, or aggravate. Regardless of which word you choose, be sure that it accurately conveys the level and type of annoyance you're attempting to describe.