frightened (adj.)

• aghast
• alarmed
• anxious
• apprehensive
• aroused
• daunted
• dismayed
• disquieted
• edgy
• excitable
• fearful
• high-strung
• irritable
• nervous
• nervy
• overstrung
• panicky
• scared
• scary
• startled
• terrified
• uneasy