The word "antitypical" refers to something that is atypical or unusual in comparison to typical or normal examples of its kind. Synonyms for this word include untypical, aberrant, deviant, eccentric, unconventional, nonconforming, singular, and peculiar. These words imply a departure from the usual or expected, either in behavior, appearance, or character. Other similar words include unique, extraordinary, exceptional, rare, and novel. Antonyms for "antitypical" include typical, average, ordinary, usual, standard, and common. When describing something as antitypical, it is important to consider the context and whether it denotes a positive or negative connotation.