11 letters · 19 points in Scrabble
noun the unintentional misuse of a word by confusion with one that sounds similar
originFrom the name of Mrs. Malaprop, a character in the play The Rivals (1775) by Richard Brinsley Sheridan + -ism. As dramatic characters in English comic plays of this time often had allusive names, it is likely that Sheridan fashioned the name from malapropos (“inappropriate; inappropriately”), from French mal à propos. Mrs. Malaprop is perhaps the best-known example of a familiar comedic character…
Etymology from Wiktionary, CC BY-SA 3.0