Hello! It sounds like you're encountering a peculiar issue with Wordscapes where your valid words are being marked as "word not used in puzzle." Let's see if we can get this sorted out together!

First, can you tell me if this issue is happening in a particular level or throughout the game? Also, have you tried closing the app and reopening it or perhaps restarting your Mac? These steps can sometimes resolve minor glitches.

If that doesn't help, we can try clearing the game's cache. Here’s how you can do that on your Mac:

1. Quit Wordscapes if it's currently open.
2. Open Finder and click on "Go" in the menu at the top.
3. Select "Go to Folder…" from the dropdown menu.
4. Type ~/Library/Containers/ in the box and hit "Go."
5. Look for any folders related to Wordscapes and move them to the trash.
6. Restart your Mac and then open Wordscapes again.

Let me know if you've tried any of these steps or if this problem persists!