unconquerable vs insuperable

unconquerable and insuperable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unconquerable	No	Yes	No	No
insuperable	No	Yes	No	No

As adjectives, unconquerable and insuperable are synonyms defined as:

unconquerable and insuperable: incapable of being surmounted or excelled

unconquerable (adjective)	insuperable (adjective)
not capable of being conquered or vanquished or overcome	incapable of being surmounted or excelled
incapable of being surmounted or excelled	impossible to surmount