Yes, scheme is a Scrabble word!

Verb

1. Form intrigues (for) in an underhand manner

2. Devise a system or form a scheme for

Noun

1. An elaborate and systematic plan of action

2. A statement that evades the question by cleverness or trickery

3. A group of independent but interrelated elements comprising a unified whole

4. An internal representation of the world; an organization of concepts and actions that can be revised by new information about the world

5. A schematic or preliminary plan