wraith

As nouns the difference between wraith and bellow

is that wraith is a ghost or specter, especially seen just after a person's death while bellow is the deep roar of a large animal, or any similar loud noise.

As a verb bellow is

to make a loud, deep, hollow noise like the roar of an angry bull.

As nouns the difference between wraith and apparition

is that wraith is a ghost or specter, especially seen just after a person's death while apparition is an act of becoming visible; appearance; visibility.

As nouns the difference between wraith and barghest

is that wraith is a ghost or specter, especially seen just after a person's death while barghest is a legendary monstrous black dog, said to possess large teeth and claws and (sometimes) to be capable of changing form.