Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
admīrābĭlĭtas, ātis, f. [admirabilis], the quality that produces admiration or wonder, admirableness, wonderfulness (vis, quae admirationem excitat): quanta sit admirabilitas caelestium rerum atque terrestrium, Cic. N. D. 2, 36: cum admirabilitate maxima, id. ib. 2, 40: haec animi despicientia admirabilitatem magnam facit, excites great admiration of the possessor of this virtue, id. Off. 2, 11.