shareowner vs shareholder

shareowner and shareholder both are nouns.

Word	Noun	Adjective	Verb	Adverb
shareowner	Yes	No	No	No
shareholder	Yes	No	No	No

As nouns, shareowner and shareholder are synonyms defined as:

shareowner and shareholder: someone who holds shares of stock in a corporation

Other synonyms of shareowner include stockholder.

shareowner (noun)	shareholder (noun)
someone who holds shares of stock in a corporation	someone who holds shares of stock in a corporation