Yes, tilts is a Scrabble word!

Verb

1. To incline or bend from a vertical position

2. Heel over

3. Move sideways or in an unsteady way

4. Charge with a tilt

Noun

1. A combat between two mounted knights tilting against each other with blunted lances

2. A contentious speech act; a dispute where there is strong disagreement

3. A slight but noticeable partiality

4. The property possessed by a line or surface that departs from the vertical

5. Pitching dangerously to one side