wraith vs fantasm

wraith and fantasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
wraith	Yes	No	No	No
fantasm	Yes	No	No	No

As nouns, fantasm is a hypernym of wraith; that is, fantasm is a word with a broader meaning than wraith:

Other hypernyms of wraith include apparition, phantasm, phantasma, phantom, shadow.

wraith (noun)	fantasm (noun)
a mental representation of some haunting experience	something existing in perception only
	a ghostly appearing figure