Yes, suspect is a Scrabble word!

Verb

1. Imagine to be the case or true or probable

2. Regard as untrustworthy; regard with suspicion; have no faith or confidence in

3. Hold in suspicion; believe to be guilty

Adjective

1. Not as expected

Noun

1. Someone who is under suspicion

2. A person or institution against whom an action is brought in a court of law; the person being sued or accused