1) Addled 2) A sea 3) At a loss 4) At sea 5) Bemused 6) Confused 7) Mazed 8) Mystified 9) Nonped 10) Nonplused 11) Nonplussed 12) Perplexed 13) Vexed 1) At a loss 2) At sea 3) Baffled 4) Bamboozled 5) Befuddled 6) Bemused 7) Bewildered 8) Confounded 9) Confused 10) Filled with bewilderment 11) Mystified 12) Nonplused 13) Nonplussed 14) Perplexed 15) PlayStation Network game 16) SNK game 17) Thrown 
• (imp. & p. p.) of Puzzle
[NAEP glossary] filled with bewilderment