Peccantly is an adjective used to describe someone or something as sinful or immoral. Synonyms for the word peccantly include wickedly, iniquitously, depravedly, immorally, unrighteously, sinfully, and godlessly. These words are often used interchangeably to convey similar meaning. Other synonyms for peccantly are unjustly, outrageously, corruptly, illegally, and nefariously. These words have different connotations, but they all describe acts or behavior that goes against established moral principles. Choosing the right synonym for peccantly depends on context and intended tone. Regardless of the synonym used, the meaning remains clear, that the subject being referred to is behaving in a morally wrong way.