illusion vs deception

illusion and deception both are nouns.

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

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

Other hypernyms of illusion include deceit, dissembling, dissimulation.

As nouns, illusion and deception are synonyms defined as:

illusion and deception: an illusory feat; considered magical by naive observers

Other synonyms of illusion include conjuration, conjuring trick, legerdemain, magic, magic trick, thaumaturgy, trick.

illusion (noun)	deception (noun)
the act of deluding; deception by creating illusory ideas	the act of deceiving
an illusory feat; considered magical by naive observers	an illusory feat; considered magical by naive observers
something many people believe that is false	a misleading falsehood
an erroneous mental representation