calcium vs calcify

calcium is a noun but calcify is not a noun.

Word	Noun	Adjective	Verb	Adverb
calcium	Yes	No	No	No
calcify	No	No	Yes	No

calcium (noun)	calcify (noun)
a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals

calcium (verb)	calcify (verb)
	turn into lime; become calcified
	convert into lime
	become impregnated with calcium salts
	become inflexible and unchanging