chalk up vs number

chalk up is not a noun while number is a noun.

Word	Noun	Adjective	Verb	Adverb
chalk up	No	No	Yes	No
number	Yes	No	Yes	No

chalk up (noun)	number (noun)
	an item of clothing
	the property possessed by a sum or total or indefinite quantity of units or individuals
	a clothing measurement
	one of a series published periodically
	a symbol used to represent a number
	a numeral or string of numerals that is used for identification and may be attached to accounts, memberships, etc.
	the number is used in calling a particular telephone
	a short performance that is part of a longer program
	the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural)
	a numbered item in a series
	a select company of people
	a concept of quantity involving zero and units

chalk up (verb)	number (verb)
keep score, as in games	place a limit on the number of
accumulate, sometimes as a debt	determine the number or amount of
	enumerate
	give numbers to
	add up in number or quantity
	put into a group