The word "questioning" is commonly used in everyday communication, but it's always good to have an arsenal of synonyms at one's disposal to avoid repetition and spice up one's vocabulary. Some synonyms for "questioning" include "inquiring", which implies an investigative or research-based approach, "interrogating", which connotes a more formal or authoritative style of questioning, "quizzing", which is a more lighthearted term often used in informal settings, and "probing", which suggests a deeper, more exploratory line of questioning. Other synonyms for "questioning" might include "examining", "scrutinizing", "vetting", "grilling", or "cross-examining", depending on the context of the conversation or inquiry.