Yes, dope is a Scrabble word!

Verb

1. Take drugs to improve one's athletic performance

2. Add impurities to (a semiconductor) in order to produce or modify its properties

3. Give a narcotic to

Noun

1. Street names for marijuana

2. An ignorant or foolish person

3. Carbonated drink flavored with extract from kola nuts (`dope' is a southernism in the United States)

4. Slang terms for inside information