expose vs sell someone out

expose is a noun but sell someone out is not a noun.

Word	Noun	Adjective	Verb	Adverb
expose	Yes	No	Yes	No
sell someone out	No	No	Yes	No

expose (noun)	sell someone out (noun)
the exposure of an impostor or a fraud

expose (verb)	sell someone out (verb)
abandon by leaving out in the open air	give information that compromises others
expose while ridiculing; especially of pretentious or false claims and ideas
make known to the public information that was previously known only to a few people or that was meant to be kept a secret
put in a dangerous, disadvantageous, or difficult position
remove all or part of one's clothes to show one's body
to show, make visible or apparent
expose to light, of photographic film
expose or make accessible to some action or influence
reveal to view as by removing a cover