Is there a good word for "unsurpassability"?

nouns single-word-requests

Solution 1:

Could insuperable fit what you have in mind?

incapable of being surmounted, overcome, passed over, or solved — in·su·per·a·bly adverb

Solution 2:

Depends on the context you want to use the word in

Consider:

unmatchable

eminent beyond or above comparison; "matchless beauty"; "the team's nonpareil center fielder"; "she's one girl in a million"; "the one and only Muhammad Ali"; "a peerless scholar"; "infamy unmatched in the Western world"; "wrote with unmatchable clarity"; "unrivaled mastery of her art" -the free dictionary

incomparable

beyond comparison; matchless or unequaled: incomparable beauty. -dictionary.com

The Free Dictionary also gives the following as synonynms and related words:

matchless, nonpareil, one and only, peerless, unrivaled, unrivalled, unmatched, one, incomparable, uncomparable

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