The phrase "reason away" can be used to describe someone who is trying to explain or justify something that may seem unusual or unacceptable. However, there are several synonyms for this phrase that can be used to capture the same meaning. Some examples include "rationalize," "justify," "excuse," "explain away," "defend," and "apologize for." Each of these words conveys the idea that someone is trying to find a way to make something sound more reasonable or acceptable, even if it goes against common sense or societal norms. Ultimately, the use of these synonyms can help to convey a more nuanced and accurate understanding of someone's motivations or actions.