Oxford Dictionary
bemusement
be ¦muse |ment |bɪˈmjuːzm (ə )nt | ▶noun [ mass noun ] the fact or condition of being bemused; puzzlement: we turned to each other in utter bemusement.
Oxford Thesaurus
bemusement
bemusement noun Rachel shook her head in bemusement: bewilderment, confusion, puzzlement, perplexity, bafflement, befuddlement, stupefaction, mystification, incomprehension, disorientation, dumbfoundedness, astonishment; informal discombobulation, bamboozlement, cluelessness; rare disconcertment.