Flighty is a related term of imaginative.
As adjectives the difference between flighty and imaginative
is that flighty is given to unplanned and silly ideas or actions while imaginative is having a lively or creative imagination.
flighty
English
Adjective
(er)
Given to unplanned and silly ideas or actions.
imaginative
English
Adjective
(
en adjective)
having a lively or creative imagination
tending to be fanciful or inventive
false or imagined