What's the noun for piece? Here's the word you're looking for.
piece
A part of a larger whole, usually in such a form that it is able to be separated from other parts.
A single item belonging to a class of similar items
(chess) One of the figures used in playing chess, specifically a higher-value figure as distinguished from a pawn; by extension, a similar counter etc. in other games.
A coin, especially one valued at less than the principal unit of currency.
An artistic creation, such as a painting, sculpture, musical composition, literary work, etc.
(baseball) Used to describe a pitch that has been hit but not well, usually either being caught by the opposing team or going foul. Usually used in the past tense with got, and never used in the plural.