Mammoth Uncensored Word List:
127 words ending with y, 18 letters long

anthropocentricity apophthegmatically autobiographically biophysiologically biotechnologically characteristically cholecystocolotomy chondrogenetically chronobiologically chronostratigraphy claustrophobically collectivistically counterintuitively cytohistopathology disproportionately distinguishability electrocapillarity electrooculography electrophotography enantioselectively gastroduodenostomy geochronologically geomorphologically hepatosplenomegaly histocompatibility hyperbrachycephaly hypercoagulability hypersentimentally hypersynchronously immunoscintigraphy incommensurability inconsequentiality indiscriminatingly ineffervescibility interchangeability intraventricularly lymphoscintigraphy magnetoelectricity magnetostrictively mandibulomaxillary metallographically microcrystallinity microheterogeneity micropalaeontology misunderstandingly nephroureterectomy neuroendocrinology nonauthoritatively noncardiopulmonary noncontroversially nondevelopmentally nonmetallurgically nonphysiologically nonplutocratically nonproportionality nonsanctimoniously nonstereotypically nonsympathetically nontechnologically nontherapeutically nontransferability nontransgressively nonunderstandingly ophthalmologically orthosymmetrically oscillographically overapprehensively overillustratively overimpressionably overintellectually overoptimistically overpresumptuously oversentimentality oversusceptibility palaeoanthropology pharmacotoxicology phenomenologically photoluminescently photosynthetically polyendocrinopathy postdepositionally preaccommodatingly predeterminability propagandistically psychoanalytically psychopharmacology pterylographically quantificationally radioimmunotherapy radiosymmetrically representationally roentgenologically sedimentologically semibiographically semiconservatively semimetaphorically semiprofessionally semiquantitatively semirespectability sesquicentennially sigmoidorectostomy sigmoidoscopically somnambulistically spectrofluorometry spectrographically spectroheliography stereoisomerically stereospecifically stoichiometrically submicroscopically superenergetically supersentimentally supersymmetrically supersynchronously tachistoscopically tetrasymmetrically thermoelectrically tracheolaryngotomy transformationally ultracentrifugally ultrarevolutionary unbureaucratically unconstitutionally undiscriminatingly unenthusiastically vasoepididymostomy zygomaticomaxillay