superlativeness

noun

1. (uncountable)The state or condition of being superlative.

   “"I just wrote, 'Am I still the same to you, dear?' and gave him the piece of paper. He took it and seemed to read it in that dreadfully detached way he has towards everything and then very slowly and shakily—all straight lines and angles you know—he scrawled, 'Dear. Dearest,' underneath the other. That was fairly satisfactory at all events. It indicated a sufficiently reciprocal superlativeness of feeling."”