Something beyond compare; a thing with which there is no comparison.
Not able to be compared.
So much better than another as to be beyond comparison; matchless or unsurpassed.
Something that is slightly different from a type or norm.
A different sequence of a gene (locus).
A variable that can hold any of various unrelated data types.
One of a set of words or other linguistic forms that conveys the same meaning or serves the same function.
Showing deviation or disagreement.
Showing variety, diverse.
Covariant and/or contravariant.