Yes, cranks is a Scrabble word!

Verb

1. Travel along a zigzag path

2. Start by cranking

3. Rotate with a crank

4. Fasten with a crank

5. Bend into the shape of a crank

Noun

1. A bad-tempered person

2. A whimsically eccentric person

3. An amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant

4. A hand tool consisting of a rotating shaft with parallel handle