copyrighted vs proprietary

copyrighted is not a noun while proprietary is a noun.

Word	Noun	Adjective	Verb	Adverb
copyrighted	No	Yes	No	No
proprietary	Yes	Yes	No	No

copyrighted (noun)	proprietary (noun)
	an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits

copyrighted (adjective)	proprietary (adjective)
(of literary or musical or dramatic or artistic work) protected by copyright	protected by trademark or patent or copyright; made or produced or distributed by one having exclusive rights