Roguish is a descriptive term that suggests someone is playing the rogue or behaving in a challenging, but not necessarily harmful way. Some synonyms that can be used instead of roguish include mischievous, teasing, playful, rascally, impish, saucy, prankish, impudent, sly, and cunning. Each of these words has a slightly different connotation, with some suggesting a more innocent playfulness and others implying a more calculated or underhanded approach. When choosing a synonym for roguish, it is important to consider the overall tone and context of the situation to find the most appropriate alternative.