capital stock vs authorized stock

capital stock and authorized stock both are nouns.

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

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

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

Other synonyms of capital stock include authorized shares.

capital stock (noun)	authorized 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