over the counter security vs unlisted security

over the counter security and unlisted security both are nouns.

Word	Noun	Adjective	Verb	Adverb
over the counter security	Yes	No	No	No
unlisted security	Yes	No	No	No

As nouns, over the counter security and unlisted security are synonyms defined as:

over the counter security and unlisted security: a security traded in the over-the-counter market

Other synonyms of over the counter security include OTC security.

over the counter security (noun)	unlisted security (noun)
a security traded in the over-the-counter market	a security traded in the over-the-counter market