incomparable, uncomparable(adj)

such that comparison is impossible; unsuitable for comparison or lacking features that can be compared

"an incomparable week of rest and pleasure"; "the computer proceeds with its incomparable logic and efficiency"; "this report is incomparable with the earlier ones because of different breakdowns of the data"

uncomparable(Adjective)

Not able to be compared; not comparable.

uncomparable(Adjective)

That cannot take the three degrees of comparison; not comparable.