nickel vs millerite

nickel and millerite both are nouns.

Word	Noun	Adjective	Verb	Adverb
nickel	Yes	No	Yes	No
millerite	Yes	No	No	No

nickel (noun)	millerite (noun)
a United States coin worth one twentieth of a dollar	a yellow mineral consisting of nickel sulfide; a minor source of nickel
five dollars worth of a drug
a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite

nickel (verb)	millerite (verb)
plate with nickel