illusion

As a letter s

is the letter s with a.

As a noun illusion is

.

Dementia is a related term of illusion.

As nouns the difference between dementia and illusion

is that dementia is (pathology) a progressive decline in cognitive function due to damage or disease in the brain beyond what might be expected from normal aging areas particularly affected include memory, attention, judgement, language and problem solving while illusion is .

As nouns the difference between illusion and truth

is that illusion is while truth is the state or quality of being true to someone or something.

As a verb truth is

(obsolete|transitive) to assert as true; to declare, to speak truthfully.

As an adjective illicit

is (legal) not approved by law, but not invalid.

As a noun illusion is

.

As nouns the difference between illusion and decoy

is that illusion is while decoy is a person or object meant to lure something to danger.

As a verb decoy is

to act or use a decoy.

As nouns the difference between illusion and makebelieve

is that illusion is while makebelieve is .

As an adjective hallucinatory

is partaking of, or tending to produce, hallucination.

As a noun illusion is

.

As nouns the difference between illusion and abstraction

is that illusion is while abstraction is the act of abstracting, separating, withdrawing, or taking away; withdrawal; the state of being taken away .

As nouns the difference between hoax and illusion

is that hoax is anything deliberately intended to deceive or trick while illusion is .

As a verb hoax

is to deceive (someone) by making them believe something which has been maliciously or mischievously fabricated (scam).

As nouns the difference between imaginary and illusion

is that imaginary is imagination; fancy while illusion is .

As an adjective imaginary

is existing only in the imagination.