Synonyms of dumbfounding

Verb

1. perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound, confuse, throw, fox, befuddle, fuddle, bedevil, confound, discombobulate

usage: be a mystery or bewildering to; "This beats me!"; "Got me--I don't know the answer!"; "a vexing problem"; "This question really stuck me"

Adjective

1. astounding, dumbfounding, dumfounding, incredible (vs. credible), unbelievable

usage: bewildering or striking dumb with wonder