stickler Synonyms

hard taskmaster stumper sphinx riddle rebus quibbler puzzle purist punctilious problem prig precisian poser perplexity teaser twister tyrant knotty question tough nut to crack fussbudget drill sergeant diehard picky pernickety nitpicker fusspot fuss-budget packrat thriller zealot perfectionist pedant particular enforcer drillmaster dogmatist doctrinaire disciplinarian dictator despot cryptogram conundrum contender conscionable conformist bigot enigma fanatic finicky oppressor