doubtful vs suspicious

doubtful

• Suspicious, or of dubious character. 

• Experiencing or showing doubt, sceptical. 

• Subject to, or causing doubt. 

• Improbable or unlikely. 

• Unclear or unreliable. 

• Undecided or of uncertain outcome. 

• A doubtful person or thing. 

suspicious

• Distrustful or tending to suspect. 

• Arousing suspicion. 

• Expressing suspicion