deceased person vs person

deceased person and person both are nouns.

Word	Noun	Adjective	Verb	Adverb
deceased person	Yes	No	No	No
person	Yes	No	No	No

As nouns, person is a hypernym of deceased person; that is, person is a word with a broader meaning than deceased person:

deceased person: someone who is no longer alive
person: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of deceased person include individual, mortal, somebody, someone, soul.

deceased person (noun)	person (noun)
someone who is no longer alive	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential
	a human body (usually including the clothing)
	a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party