fantasticalness vs unreality

fantasticalness and unreality both are nouns.

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

As nouns, unreality is a hypernym of fantasticalness; that is, unreality is a word with a broader meaning than fantasticalness:

fantasticalness: The state or condition of pertaining to fantasy; of being fanciful or whimsical.
unreality: the quality possessed by something that is unreal

fantasticalness (noun)	unreality (noun)
The state or condition of pertaining to fantasy; of being fanciful or whimsical.	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