There are many alternatives to the word "explanation". For instance, if you want to describe something in a more detailed or simpler manner, you may use the terms clarification or elucidation. For a more concise explanation, synonyms such as summary or briefing could be relevant. If you are constructing an academic or scientific paper, more structured words like interpretation and analysis could be used. If trying to convey your reasoning behind a decision, justification may be most appropriate. A less formal alternative to explanation could be the word "story" or "narration", which may be suitable in a casual conversation. Overall, there are numerous options to choose from depending on the context of the situation.