apparition vs fantasm

apparition and fantasm both are nouns.

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

As nouns, apparition and fantasm are synonyms defined as:

Other synonyms of apparition include phantasm, phantasma, phantom, shadow.

As nouns, apparition and fantasm are synonyms defined as:

Other synonyms of apparition include phantasm, phantasma, phantom, specter, spectre.

apparition (noun)	fantasm (noun)
an act of appearing or becoming visible unexpectedly	something existing in perception only
something existing in perception only	a ghostly appearing figure
the appearance of a ghostlike figure
a ghostly appearing figure