Yes, cones is a Scrabble word!

Verb

1. Make cone-shaped

2. Deprive of by deceit

3. Commit to memory; learn by heart

Noun

1. Any cone-shaped artifact

2. A shape whose base is a circle and whose sides taper up to a point

3. Cone-shaped mass of ovule- or spore-bearing scales or bracts

4. A visual receptor cell in the retina that is sensitive to bright light and to color