generally accepted accounting principles vs accounting principle

generally accepted accounting principles and accounting principle both are nouns.

Word	Noun	Adjective	Verb	Adverb
generally accepted accounting principles	Yes	No	No	No
accounting principle	Yes	No	No	No

generally accepted accounting principles (noun)	accounting principle (noun)
a collection of rules and procedures and conventions that define accepted accounting practice; includes broad guidelines as well as detailed procedures	a principle that governs current accounting practice and that is used as a reference to determine the appropriate treatment of complex transactions