solecism

a socially improper or unsuitable act or remark <the solecism of asking one's hosts how much something in their house cost them> Synonyms familiarity, faux pas, gaff, gaffe, indiscretion, improprietyRelated Words blunder, error, flub, fumble, goof, lapse, miscue, misstep, mistake, oversight, slip, slipup, stumble; discourtesy, incivility, offense (or offence); boner, howler; foul-up, muff; misapprehension, miscalculation, misconception, misjudgment, misstatement, misunderstandingNear Antonyms form, manners, mores, proprietiesAntonyms amenity, attention, civility, courtesy, formality, gesture, pleasantry