As adjectives the difference between fanciful and unsubstantial
is that fanciful is imaginative or fantastic; unreal or imagined while unsubstantial is alternative form of lang=en.
fanciful
English
Alternative forms
* fancifull
* phanciful
* phancifull
Adjective
(
en adjective)
imaginative or fantastic; unreal or imagined
Derived terms
* fancifully
* fancifulness