For those extra words, the most important card among the three card models is the “What’s the spelling?” card. We've definitely had folks suspend the other two card models, which is a totally viable thing to do.
How to suspend spelling cards
To suspend those spelling cards, go to the browser, select that card model on the left side (similar to “2". Picture Words). You’ll see something like “mid:1366716141610” in the search field.
Next, add “card:3” to the search field, and it will give you a list of only the spelling cards. (You should see “Spelling?” in the “Card” column in the browser.) Select all those cards (you can shift-click to select a bunch of them in a row) and click “Suspend” up top. You can tell they’re suspended successfully when parentheses appear around the number in the “Due” field. For example, if it shows 197 cards under Due, they're not suspended. After you suspend them, it will show that number in parentheses, like (197).