* It's a misspelling. There might be a similar word with a slightly different spelling that you're thinking of.
* It's a regional term or slang. The word might be used in a specific community or dialect, and is not widely known.
* It's a made-up word. It could be a fictional term from a book, movie, or game.
To help me understand what you're looking for, could you provide some context?
For example:
* Where did you encounter this word? (book, website, conversation, etc.)
* What was the word's context? (What was being discussed or described?)
With more information, I might be able to help you figure out what "tomanuch" means.