A monologue refers to a lengthy speech or a solo performance delivered by a single person. If you want to convey the same idea using different words, you can use synonyms for the word monologue. Some of the synonyms for monologue include soliloquy, narration, spiel, oration, discourse, harangue, diatribe, address, sermon, and declamation. Each of these words offers a different connotation and may be more appropriate depending on the context. For example, a soliloquy refers to a speech delivered by a character in a play, whereas sermons are typically given in a religious context. Understanding the nuances of these synonyms can help you choose the best word for your writing or conversation.