audit vs auditor

audit and auditor both are nouns.

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

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

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