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