Having an aversion to something means having a strong feeling of dislike or repulsion towards it. There are several synonyms for this phrase that can be used interchangeably depending on the context. For example, words like loathe, detest, abhor, despise, and hate can be used to express a strong level of dislike or animosity towards something. On the other hand, words like dislike, disdain, disfavor, reject, and shun can be used to describe a milder form of aversion or avoidance towards something. Using synonyms for the phrase "have an aversion to" can make your writing sound more varied and dynamic, so it's always good to have a few options on hand.