The Collaborative International Dictionary of English v.0.48:
comparability \comparability\ n. a similarity allowing comparison; an approximate equivalence. Syn: comparison, compare, equivalence. [WordNet 1.5]WordNet (r) 3.0 (2006):
comparability n 1: qualities that are comparable; "no comparison between the two books"; "beyond compare" [syn: comparison, compare, equivalence, comparability]