topaz vs tan

topaz and tan both are nouns.

Word	Noun	Adjective	Verb	Adverb
topaz	Yes	No	No	No
tan	Yes	Yes	Yes	No

As nouns, topaz and tan are synonyms defined as:

topaz (noun)	tan (noun)
a light brown the color of topaz	a light brown the color of topaz
a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone	ratio of the opposite to the adjacent side of a right-angled triangle
a yellow quartz	a browning of the skin resulting from exposure to the rays of the sun

topaz (adjective)	tan (adjective)
	of a light yellowish-brown color

topaz (verb)	tan (verb)
	get a tan, from wind or sun
	treat skins and hides with tannic acid so as to convert them into leather