What's the noun for fairydoms? Here's the word you're looking for.
fairy
(uncountable, obsolete) The realm of faerie; enchantment, illusion.
A mythical being with magical powers, known in many sizes and descriptions, although often depicted in modern illustrations only as small and spritely with gauze-like wings, and revered in some modern forms of paganism; a sprite.
Two species of hummingbird in the genus Heliothryx.
“It removed you from the place in which you had a meaning, and to which you gave meaning in return by dedicating your life to it, and spirited you away into fairylands where you were, and looked, frankly absurd.”
“Fairylands is a name that conjures up a dreamy, other-worldly place, somewhere to escape the cares of a busy life.”