Naughtier is a word that describes someone or something that is mischievous or disobedient. Synonyms for naughtier include words like rascally, wayward, impish, insubordinate, impudent, and disobedient. These words suggest a sense of playfulness and mischievousness, but also a certain level of defiance or stubbornness. Other synonyms for naughtier may include words like unruly, troublesome, or difficult, which suggest a more serious level of misbehavior. Ultimately, the choice of synonym for naughtier will depend on the context and tone of the writing, as well as the intended meaning of the word.