"puzzle" in the noun sense
1. puzzle, puzzler, mystifier, teaser
a particularly baffling problem that is said to have a correct solution
"he loved to solve chessmate puzzles"
"that's a real puzzler"
2. puzzle
a game that tests your ingenuity
"puzzle" in the verb sense
1. perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound
be a mystery or bewildering to
"This beats me!"
"Got me
2. puzzle
be uncertain about think about without fully understanding or being able to decide
"We puzzled over her sudden departure"
Source: WordNet® (An amazing lexical database of English)
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