Synonyms of the word 
IRREALITY → NONENTITY - NONEXISTENCE - UNREALITY
irreality
- n. (uncommon) Unreality.
nonentity
- n. an unimportant or insignificant person.
- n. (uncountable): the state of not existing; nonexistence.
nonexistence
- n. The state of not existing.
unreality
- n. Lack of reality or real existence.
- n. (uncountable) The state of being unreal.
- n. (countable) That which has no reality or real existence; something unreal or imaginary.
- n. Unpractical character; visionariness.
If you are interested in words, visit the following sites :
- wiktionary.org/irreality For complete definition of a word
- 1word.ws/irreality to play with words, suffixs, prefixs, etc.