Yes, slots is a Scrabble word!

Verb

1. Assign a time slot

Noun

1. A position in a grammatical linguistic construction in which a variety of alternative units are interchangeable

2. A small slit (as for inserting a coin or depositing mail)

3. A time assigned on a schedule or agenda

4. A position in a hierarchy or organization

5. The trail of an animal (especially a deer)

6. (computer) a socket in a microcomputer that will accept a plug-in circuit board

7. A slot machine that is used for gambling