apparition vs illusion

apparition and illusion both are nouns.

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

As nouns, illusion is a hypernym of apparition; that is, illusion is a word with a broader meaning than apparition:

Other hypernyms of apparition include semblance.

apparition (noun)	illusion (noun)
an act of appearing or becoming visible unexpectedly	the act of deluding; deception by creating illusory ideas
something existing in perception only	an illusory feat; considered magical by naive observers
the appearance of a ghostlike figure	something many people believe that is false
a ghostly appearing figure	an erroneous mental representation