err

[1]

be wrong , mistake , slip , be in error , be mistaken , be inaccurate , be incorrect , be in the wrong , go wrong , go astray , make a mistake , miscalculate , (make a) blunder , bungle , botch , fumble , muff , make a mess of , make a faux pas , mess up , (US) bobble , (Colloq) goof (up) , slip (up) , drop a clanger , foul up , (Brit) drop a brick , blot one's copybook , (Slang) screw up , (Brit) boob , (Colloq) (Slang) fuck up

[2]

misbehave , stray , drift , sin , transgress , trespass , lapse , fall , do wrong