Synonyms of improprieties

1 Syllable
goof, slip
2 Syllables
blunder, gaffe
3 Syllables
solecism, gaucherie, barbarism, vulgarism, rudeness
4 Syllables
immodesty, indecency, incongruity, incorrectness, indecorum, vulgarity, unseemliness, impudence
5 Syllables
inelegance
6 Syllables
unsuitability