The word "question" is commonly used to refer to an inquiry or an expression of doubt or uncertainty. However, there are several synonyms to this word that can be used in different contexts. One common synonym is "query," which implies a request for information or clarification. Another synonym is "inquiry," which suggests a more thorough investigation or exploration of a topic. "Interrogation" is a synonym that connotes a more formal or intense questioning, often associated with legal or investigative contexts. "Doubt" and "uncertainty" can also be used as synonyms in certain contexts. It is important to choose the appropriate synonym based on the intended meaning and tone of the sentence or conversation.