1) Agog 2) Amazed 3) Astonied 4) Astonished 5) Astounded 6) Confused 7) Dumbfounded 8) Dumfounded 9) Flabbergasted 10) Gobsmacked 11) Jiggered 12) Openmouthed 13) Popeyed 14) Startled 15) Stunned 16) Stupefied 17) Taken aback 18) Takenunawares 19) Thunderstruck 1) Amazed 2) Astonied 3) Astonished 4) Astounded 5) Bewildered 6) Caught in the act 7) Caught on the hop 8) Caught unawares 9) Dazed 10) Dumbfounded 11) Dumfounded 12) Flabbergasted 13) Floored 14) Gobsmacked 15) Goggle-eyed 16) Incredulous 17) Is that what you expected 18) Jiggered 19) Knocked for six 
• (imp. & p. p.) of Surprise
[adj] - taken unawares or suddenly and feeling wonder or astonishment
adjective taken unawares or suddenly and feeling wonder or astonishment; `surprised by her student`s ingenuity`; `surprised that he remembered my name`; `a surprised expression`