impurity vs alloy

impurity and alloy both are nouns.

Word	Noun	Adjective	Verb	Adverb
impurity	Yes	No	No	No
alloy	Yes	No	Yes	No

As nouns, alloy is a hyponym of impurity; that is, alloy is a word with a more specific, narrower meaning than impurity:

impurity: the condition of being impure
alloy: the state of impairing the quality or reducing the value of something

Other hyponyms of impurity include adulteration, debasement, admixture, contamination, taint, dirtiness, putridity, pollution.

impurity (noun)	alloy (noun)
the condition of being impure	the state of impairing the quality or reducing the value of something
worthless or dangerous material that should be removed	a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten

impurity (verb)	alloy (verb)
	lower in value by increasing the base-metal content
	make an alloy of