revenant

nouns

a person who returns after a lengthy absence
is a type of (narrower)
a human being
"there was too much for one person to do"
someone who has returned from the dead
is a type of (narrower)
the visible disembodied soul of a dead person

adjectives

of or relating to or typical of a revenant
"revenant shrieks and groans"
coming back
"a revenant ghost"