Unreproduced means that something cannot be replicated or repeated. There are various synonyms to the word unreproduced, such as unique, one-of-a-kind, original, unparalleled, inimitable, singular and non-duplicable. Unique refers to something that is distinctive or peculiar, and one-of-a-kind means that something is the only one of its kind, and cannot be found anywhere else. Original connotes something that is created or initiated for the first time. If something is unparalleled, that means that it is without equal, while inimitable means that something cannot be imitated or copied. Singular refers to something that stands out as unique, and non-duplicable means that something cannot be duplicated.