chalk vs describe

chalk is a noun but describe is not a noun.

Word	Noun	Adjective	Verb	Adverb
chalk	Yes	No	Yes	No
describe	No	No	Yes	No

chalk (noun)	describe (noun)
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

chalk (verb)	describe (verb)
write, draw, or trace with chalk	identify as in botany or biology, for example
	give a description of
	to give an account or representation of in words
	make a mark or lines on a surface