3 syllables:
-acity, acity, cassetty, cassity, cass city, gas city, pasay city, udacity

4 syllables:
ampacity, audacity, bibacity, capacity, dicacity, edacity, feracity, furacity, loquacity, mendacity, metacity, minacity, mordacity, opacity, predacity, procacity, pugnacity, rapacity, sagacity, urbacity, veracity, vivacity, voracity

5 syllables:
disputacity, efficacity, incapacity, inveracity, perspicacity, pertinacity, pervicacity, saponacity, unveracity

6 syllables:
biocapacity, carnivoracity, channel capacity, mental capacity, overcapacity, radiopacity, seating capacity

7 syllables:
radio-opacity

8 syllables:
electrical capacity

10 syllables:
list of stadiums by capacity

3 syllables:
radically, baptistry, actively, savagely, plaguily, drastically, gravity, ramblingly, slantingly, knavishly, passively, scathingly, lavishly, amity, panicky, candidly, pantingly, validly, pallidly, sanctity, tragically, graphically, vanity, rakishly, cassidy, casuistry, clannishly, faddishly, flashily, gaspingly, gramineae, haptically, mattingly, naseby, raffishly, raspingly, smashingly, stragglingly

4 syllables:
abstractedly, magically, humanity, centrality, brutality, sporadically, expansively, attractively, fatality, mechanically, erratically, mentality, enchantingly, ecstatically, outstandingly, nostalgically, calamity, rascality, plurality, grammatically, inanity, insanity, dextrality, emphatically, , fantastically, venality, dramatically, banality, sarcastically, urbanity, organically, adactyly, bombastically, carnality, combatively, offhandedly, protractedly, syndactyly

5 syllables:
punctuality, mutuality, verticality, criminality, rationality, illegality, enigmatically, symptomatically, whimsicality, speciality, autocratically, anacanthini, theatrically, prodigality, principality, christianity, personality, nationality, democratically, puritanically, technicality, corporeality, inorganically, typicality, automatically, informality, systematically, atonality, temporality, immorality, diplomatically, sinistrality, laterality, physicality, romantically, externality, logicality, marginality, immortality, brachytactyly, cordiality, cruciality, everlastingly, factuality, graduality, single-handedly, sociality, unattractively, undramatically, ungrammatically, unromantically

6 syllables:
materiality, diagrammatically, split personality, conditionality, impartiality, instrumentality, intentionality, reciprocality, illogicality, proportionality, eventuality, conventionality, enthusiastically, emotionality, ephemerality, geographically, horizontality, illiberality, polytonality, directionality, orthogonality, originality, sentimentality, conceptuality, effectuality, traditionality, undemocratically, undiplomatically, unsystematically

7 syllables:
cult of personality, individuality, constitutionality, anal personality, counterfactuality, immateriality, ineffectuality, internationality, oral personality, superficiality, unconventionality, unemotionality, unenthusiastically, unoriginality

8 syllables:
multiple personality, heterosexuality, genital personality, sexual immorality

9 syllables:
psychopathic personality