calcium carbonate vs chalk

calcium carbonate and chalk both are nouns.

Word	Noun	Adjective	Verb	Adverb
calcium carbonate	Yes	No	No	No
chalk	Yes	No	Yes	No

calcium carbonate (noun)	chalk (noun)
a salt found in nature as chalk or calcite or aragonite or limestone	a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
	an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
	a pure flat white with little reflectance
	a soft whitish calcite

calcium carbonate (verb)	chalk (verb)
	write, draw, or trace with chalk