For a long fictional story:
* Book: This is the most general synonym.
* Story: This is a broad term that can refer to any narrative.
* Tale: This suggests a more traditional or epic story.
* Narrative: This emphasizes the storytelling aspect.
* Romance: This implies a love story.
* Saga: This suggests a long, complex story spanning generations.
* Epic: This suggests a grand and heroic story.
For a new or original idea:
* Original: This emphasizes the unique nature of the idea.
* Innovative: This suggests a creative and groundbreaking idea.
* Groundbreaking: This emphasizes the transformative nature of the idea.
* Pioneering: This suggests the idea is leading the way in a new field.
* Unprecedented: This emphasizes the idea's lack of precedent.
* Unheard of: This implies the idea is completely new.
For something that is strange or unusual:
* Unusual: This implies something that is out of the ordinary.
* Uncommon: This suggests something that is rare.
* Strange: This implies something that is odd or peculiar.
* Peculiar: This emphasizes the uniqueness of something.
* Bizarre: This suggests something that is outlandish or strange.
The best synonym to use will depend on the specific context and meaning you want to convey.