authorized stock vs capital stock

authorized stock and capital stock both are nouns.

Word	Noun	Adjective	Verb	Adverb
authorized stock	Yes	No	No	No
capital stock	Yes	No	No	No

As nouns, authorized stock and capital stock are synonyms defined as:

authorized stock and capital stock: the maximum number of shares authorized under the terms of a corporation's articles of incorporation

Other synonyms of authorized stock include authorized shares.

authorized stock (noun)	capital stock (noun)
the maximum number of shares authorized under the terms of a corporation's articles of incorporation	the maximum number of shares authorized under the terms of a corporation's articles of incorporation
	the book value of the outstanding shares of a corporation