With the Adwords Editor open, click on the Ad Groups section bottom left box. Then in main box at the top left, you'll see an error symbol that you can sort your Ad Groups by. Click it. It will bring up all the red errors to the top. Hold Control Key to select multiple and then delete them with right click and delete. Make sure the error messages are that you are missing a KW in that Ad Group.
You want to delete them, not pause them. If they stay in your campaign, it can hurt the health of it, which costs you more money.