chequer vs vary

chequer is a noun but vary is not a noun.

Word	Noun	Adjective	Verb	Adverb
chequer	Yes	No	Yes	No
vary	No	No	Yes	No

As verbs, vary is a hypernym of chequer; that is, vary is a word with a broader meaning than chequer:

Other hypernyms of chequer include motley, variegate.

chequer (noun)	vary (noun)
one of the flat round pieces used in playing the game of checkers

chequer (verb)	vary (verb)
variegate with different colors, shades, or patterns	become different in some particular way, without permanently losing one's or its former characteristics or essence
mark into squares or draw squares on; draw crossed lines on	make something more diverse and varied
	be at variance with; be out of line with
	be subject to change in accordance with a variable