The word "whys" is commonly used to ask questions about the reasons or causes of a certain phenomenon or situation. But there are plenty of other words that can be used to convey the same idea. For instance, "reasons" and "causes" are direct synonyms that can be used interchangeably. "Motives," "grounds," and "rationales" also express the idea of seeking explanations. Other synonyms include "justifications," "excuses," and "clarifications." To express skepticism, you may use words like "doubts," "skepticism," or "uncertainty." Whatever the word used, the goal remains the same - to understand the reasons behind a certain behavior or outcome.