Synonyms of 'insubstantial'
flimsy, fine, or slightHer limbs were insubstantial, almost transparent.
a flimsy wooden door
The evidence is thin, and to some extent, ambiguous.
I was too weak to move my arms and legs.
It's only made a slight difference.
She lay in bed looking particularly frail.
This is a feeble argument.
Links between the provinces were seen to be tenuous.
imaginary or unrealTheir thoughts seemed as insubstantial as smoke.
Copyright © 2016 by HarperCollins Publishers. All rights reserved.
in the sense of chimerical
wildly fanciful or imaginary
in the sense of fanciful
guided by unrestrained imagination
fanciful ideas about Martian life
Thesaurus for insubstantial from the Collins English Thesaurus