Here's what rhymes with optionality.
personality banality venality rationality centrality immorality informality seasonality functionality originality plurality emotionality marginality bestiality immortality criminality illegality intentionality temporality artificiality eventuality punctuality speciality technicality materiality mutuality principality proportionality superficiality collegiality individuality impartiality constitutionality sentimentality conventionality immateriality instrumentality unconventionality heterosexuality unconstitutionality Words that almost rhyme with optionality
tenacity veracity humanity tacitly massively panicky thematically validly pugnacity mannishly automatically dramatically radically sanctity passively lavishly savagely laughingly pertinacity mendacity invalidly passingly snappishly waggishly abashedly raffishly caddishly emphatically mechanically dynamically graphically candidly classically schematically sporadically tragically casuistry dogmatically fantastically handedly placidly statically erratically slavishly unabashedly impassively lastingly axiomatically idiomatically pneumatically inactively irascibly unflaggingly aromatically monastically operatically rheumatically systematically drastically organically sarcastically attractively diplomatically everlastingly nostalgically climatically problematically autocratically biographically chromatically emblematically enchantingly scholastically telepathically phlegmatically slantingly bombastically evenhandedly acrobatically highhandedly gymnastically prancingly democratically distractedly ecstatically interactively outstandingly photographically proactively topographically demographically enigmatically ethnographically symptomatically offhandedly orthographically thermostatically typographically outlandishly telegraphically exactingly inorganically lithographically unattractively underhandedly understandingly bureaucratically expansively aerodynamically melodramatically aristocratically autobiographically pornographically enthusiastically retroactively radioactively idiosyncratically ecclesiastically bibliographically