The term "ass-backwards" is often used to describe something that is done in an illogical or wrong way. However, there are plenty of alternative words that can be used to describe this concept. Some synonyms for "ass-backwards" include backward, wrong-headed, perverse, and inverted. Other options include misguided, nonsensical, and senseless. These words all describe something that is done in a way that doesn't make sense or is illogical. Ultimately, these synonyms can help to enhance a writer's vocabulary and provide a more nuanced way of describing situations that are done in an illogical or backwards way.