paranoia vs psychosis

paranoia and psychosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
paranoia	Yes	No	No	No
psychosis	Yes	No	No	No

As nouns, psychosis is a hypernym of paranoia; that is, psychosis is a word with a broader meaning than paranoia:

paranoia: a psychological disorder characterized by delusions of persecution or grandeur
psychosis: any severe mental disorder in which contact with reality is lost or highly distorted

paranoia (noun)	psychosis (noun)
a psychological disorder characterized by delusions of persecution or grandeur	any severe mental disorder in which contact with reality is lost or highly distorted