Noun

• S: (n) copper, Cu, atomic number 29 (a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor)
• S: (n) copper (a copper penny)
• direct hypernym / inherited hypernym / sister term
• S: (n) penny, cent, centime (a coin worth one-hundredth of the value of the basic unit)
• S: (n) coin (a flat metal piece (usually a disc) used as money)
• S: (n) coinage, mintage, specie, metal money (coins collectively)
• S: (n) currency (the metal or paper medium of exchange that is presently used)
• S: (n) medium of exchange, monetary system (anything that is generally accepted as a standard of value and a measure of wealth in a particular country or region)
• S: (n) standard, criterion, measure, touchstone (a basis for comparison; a reference point against which other things can be evaluated) "the schools comply with federal standards"; "they set the measure for all subsequent work"
• S: (n) system of measurement, metric (a system of related measures that facilitates the quantification of some particular characteristic)
• S: (n) measure, quantity, amount (how much there is or how many there are of something that you can quantify)
• S: (n) abstraction, abstract entity (a general concept formed by extracting common features from specific examples)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
• S: (n) bull, cop, copper, fuzz, pig (uncomplimentary terms for a policeman)
• S: (n) copper, copper color (a reddish-brown color resembling the color of polished copper)
• S: (n) copper (any of various small butterflies of the family Lycaenidae having coppery wings)

Verb

• S: (v) copper (coat with a layer of copper)