When it comes to talking about the concept of deviation, there are many different ways to approach the topic. One way to do so is by looking at some synonyms for the phrase "bases for deviation." For example, one might consider phrases like "reasons for deviation," "justifications for deviation," or "factors contributing to deviation." Additionally, terms like "causes of divergence," "sources of variability," and "drivers of deviation" could all be relevant synonyms. Ultimately, the choice of phrasing depends on the context and intended meaning, but having a range of synonyms at one's disposal can help to add clarity and nuance to discussions of deviation.