copper color vs mahogany

copper color and mahogany both are nouns.

Word	Noun	Adjective	Verb	Adverb
copper color	Yes	No	No	No
mahogany	Yes	No	No	No

As nouns, mahogany is a hypernym of copper color; that is, mahogany is a word with a broader meaning than copper color:

Other hypernyms of copper color include burnt sienna, reddish brown, sepia, Venetian red.

copper color (noun)	mahogany (noun)
a reddish-brown color resembling the color of polished copper	a shade of brown with a tinge of red
	any of various tropical timber trees of the family Meliaceae especially the genus Swietinia valued for their hard yellowish- to reddish-brown wood that is readily worked and takes a high polish
	wood of any of various mahogany trees; much used for cabinetwork and furniture