apparition vs phantasm

apparition and phantasm both are nouns.

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

As nouns, apparition and phantasm are synonyms defined as:

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

As nouns, apparition and phantasm are synonyms defined as:

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

apparition (noun)	phantasm (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