auditor vs audit

auditor and audit both are nouns.

Word	Noun	Adjective	Verb	Adverb
auditor	Yes	No	No	No
audit	Yes	No	Yes	No

auditor (noun)	audit (noun)
a qualified accountant who inspects the accounting records and practices of a business or other organization	a methodical examination or review of a condition or situation
someone who listens attentively	an inspection of the accounting procedures and records by a trained accountant or CPA
a student who attends a course but does not take it for credit

auditor (verb)	audit (verb)
	attend academic courses without getting credit
	examine carefully for accuracy with the intent of verification