The word 'genuine' is an antonym for 'fictional'. 'Genuine' means being truly what it is said to be, not false or made-up. So, when something is genuine, it's not fictional or pretend.
There's a story of a man who was so oblivious. He walked around with his fly unzipped all day at work. None of his colleagues had the heart to tell him until finally, his boss in a very kind way pointed it out. He was so embarrassed but it became a funny story that everyone in the office still laughs about.
Fantasy. Fantasy often involves elements that are not based on real - world facts or experiences, which is the opposite of realistic fiction that tries to depict real - life situations.
Journal. Journals are often records of real - life events, thoughts, or research findings. In contrast, a novel is a made - up story. So journal can be seen as an antonym as it represents the real and the factual, opposite to the fictional nature of a novel.
The antonym for 'novel' could be 'traditional' or 'conventional'. Something novel is new and unique, while something traditional or conventional is established and familiar.
Surreal fiction. It often presents a world that is dream - like and illogical, completely different from the down - to - earth nature of realistic fiction.