* Misusing: This is the most general term and simply means using a word incorrectly.
* Malapropism: This is a specific type of misuse where you substitute a word that sounds similar but has a different meaning. For example, saying "He's a very *incredulous* person" when you meant "incredible."
* Solecism: This is a more formal term for a grammatical error, including incorrect word usage.
* Faux pas: This refers to a social blunder, which can include using inappropriate language.
* Error: This is a general term for a mistake, which can include using the wrong word.
The specific term you use will depend on the context and the type of error being made.