As adjectives the difference between inconceivable and insupposable
is that inconceivable is unable to be conceived, unbelievable while insupposable is incapable of being supposed; inconceivable.
inconceivable
English
Adjective
(
en adjective)
unable to be conceived, unbelievable
Antonyms
* conceivable
Related terms
* inconceivability
* inconceivableness