n. 25B6; noun
I assumed it had been a mistake : ERROR, fault, inaccuracy, omission, slip, blunder, miscalculation, misunderstanding, oversight, misinterpretation, gaffe, faux pas, solecism; informal slip-up, boo-boo, howler, boner; Brit. informal boob, clanger, bloomer; N. Amer. informal goof.
spelling mistakes : MISPRINT, typographical error/mistake, typing error/mistake, corrigendum, erratum; Brit. literal; informal typo.
25B6; verb
men are apt to mistake their own feelings : MISUNDERSTAND, misinterpret, get wrong, misconstrue, misread.
children often mistake vitamin pills for sweets : CONFUSE WITH, mix up with, take for, misinterpret as.
25A0; be mistaken BE WRONG, be in error, be under a misapprehension, be misinformed, be misguided; informal be barking up the wrong tree, get the wrong end of the stick.
25A0; make a mistake GO WRONG, err, make an error, blunder, miscalculate; informal slip up, make a boo-boo, make a howler; Brit. informal boob; N. Amer. informal drop the ball, goof (up).