The words 'don't mention it' were 'don't talk about it, don't mention it, don't mention it, keep your mouth shut, hide it in the bottom of your heart, remain calm, and keep your mouth shut.
Synonym fiction refers to fictional works that play with synonyms. It might involve using many different words with similar meanings to create a rich and nuanced language in the story. For example, instead of just using the word 'happy', the author could use 'joyful', 'elated', 'gleeful' etc. throughout the text to add variety and depth to the description of a character's mood.
Another synonym could be 'frightening yarn'. 'Yarn' is an old - fashioned term for a story, and when combined with 'frightening', it clearly indicates a story that is meant to scare. This kind of story often plays on people's fears, whether it's the fear of the unknown, of something lurking in the dark, or of supernatural forces.