1) Alarmed 2) Astonished 3) Scared 4) Surprised 5) Worried 1) Caught off guard 2) Caught unaware 3) Caused to jump 4) Frightened mildly 5) Frightened suddenly 6) Given a turn 7) Made jump 8) Shocked 9) Shook up 10) Snuck up on 11) Suddenly alarmed 12) Surprised 13) Surprised suddenly 
• (imp. & p. p.) of Startle
[adj] - excited by sudden surprise or alarm and making a quick involuntary movement
adjective excited by sudden surprise or alarm and making a quick involuntary movement; `students startled by the teacher`s quiet return`; `the sudden fluttering of the startled pigeons`; `her startled expression`