burnt sienna vs mahogany

burnt sienna and mahogany both are nouns.

Word	Noun	Adjective	Verb	Adverb
burnt sienna	Yes	No	No	No
mahogany	Yes	No	No	No

As nouns, burnt sienna and mahogany are synonyms defined as:

Other synonyms of burnt sienna include reddish brown, sepia, Venetian red.

burnt sienna (noun)	mahogany (noun)
a shade of brown with a tinge of red	a shade of brown with a tinge of red
a reddish-brown pigment produced by roasting sienna	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