Yes, ate is a Scrabble word!

Verb

1. Take in solid food

2. Eat a meal; take a meal

3. Take in food; used of animals only

4. Worry or cause anxiety in a persistent way

5. Use up (resources or materials)

6. Cause to deteriorate due to the action of water, air, or an acid

Noun

1. Goddess of criminal rashness and its punishment