deceased person vs dead person

deceased person and dead person both are nouns.

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

As nouns, deceased person and dead person are synonyms defined as:

Other synonyms of deceased person include dead soul, deceased, decedent, departed.

deceased person (noun)	dead person (noun)
someone who is no longer alive	someone who is no longer alive