Duplicate
Part of speech: adjective
Definition: being the same as another; identical. This may exclude the first identical item in a series, but usage is inconsistent.
Part of speech: noun
Definition: One that resembles or corresponds to another; an identical copy.
Part of speech: verb
Definition: to make a copy of to do repeatedly; to do again to produce something equal to
Example sentence: There's plenty to criticize about the mass media, but they are the source of regular information about a wide range of topics. You can't duplicate that on blogs.
Duplication
Part of speech: noun
Definition: The act of duplicating, or the state of being duplicated; a doubling; a folding over; a fold.The act or process of dividing by natural growth or spontaneous action; as, the duplication of cartilage cells.
Example sentence: Melania rarely wears American labels, with the exception of Ralph Lauren, who created a duplication of a Jackie Kennedy look, which was basically a costume anyway.