nonproprietary vs proprietary

nonproprietary is not a noun while proprietary is a noun.

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

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

nonproprietary (adjective)	proprietary (adjective)
not protected by trademark or patent or copyright	protected by trademark or patent or copyright; made or produced or distributed by one having exclusive rights