Venetian red vs mahogany

Venetian red and mahogany both are nouns.

Word	Noun	Adjective	Verb	Adverb
Venetian red	Yes	No	No	No
mahogany	Yes	No	No	No

As nouns, Venetian red and mahogany are synonyms defined as:

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

Venetian red (noun)	mahogany (noun)
a shade of brown with a tinge of red	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