bronze vs discolor

bronze is a noun but discolor is not a noun.

Word	Noun	Adjective	Verb	Adverb
bronze	Yes	Yes	Yes	No
discolor	No	No	Yes	No

As verbs, discolor is a hypernym of bronze; that is, discolor is a word with a broader meaning than bronze:

Other hypernyms of bronze include color, colour, discolour.

bronze (noun)	discolor (noun)
a sculpture made of bronze
an alloy of copper and tin and sometimes other elements; also any copper-base alloy containing other elements in place of tin

bronze (adjective)	discolor (adjective)
of the color of bronze
made from or consisting of bronze

bronze (verb)	discolor (verb)
get a tan, from wind or sun	change color, often in an undesired manner
give the color and appearance of bronze to something	lose color or turn colorless
	cause to lose or change color