Synonyms of the word 
UNDISCOVERABLE → INDETERMINABLE - UNASCERTAINABLE - UNDETERMINABLE
undiscoverable
- adj. Unable to be discovered; hidden perfectly.
- adj. (law) Not subject to being produced in response to a discovery request.
indeterminable
- adj. That is incapable of being measured.
- adj. That is incapable of being ascertained.
- n. An indeterminable thing or quantity.
unascertainable
- adj. That cannot be ascertained; uncertain, unable to be determined or discovered.
undeterminable
- adj. not possible to determine.
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