irreality vs unreality

irreality and unreality both are nouns.

Word	Noun	Adjective	Verb	Adverb
irreality	Yes	No	No	No
unreality	Yes	No	No	No

As nouns, irreality and unreality are synonyms defined as:

irreality and unreality: the state of being insubstantial or imaginary; not existing objectively or in fact

irreality (noun)	unreality (noun)
the state of being insubstantial or imaginary; not existing objectively or in fact	the quality possessed by something that is unreal
	ineptitude in dealing with reality.
	the state of being insubstantial or imaginary; not existing objectively or in fact