Mammoth Uncensored Word List:
105 words ending with cy, 11 letters long

accountancy ambivalency antisecrecy appropriacy aristocracy astringency attractancy auriscopicy bibliomancy botanomancy bureaucracy chieftaincy chronomancy chrysocracy cleptocracy coadjacency cohabitancy coincidency complacency concernancy concipiency concurrency confederacy connascency conservancy consistency consultancy contingency conveniency convergency conversancy crithomancy delinquency demonocracy despondency determinacy diathermacy discordancy discrepancy equivalency ergatocracy erubescency excrescency exorbitancy flamboyancy flocculency fraudulency gastromancy gynecocracy heterocercy idempotency impenitency importunacy inappetency incogitancy incoherency inconstancy inexistency infrequency inhabitancy insentiency interagency irrelevancy kleptocracy lieutenancy liquescency meritocracy monovalency multiagency nondormancy nonpharmacy omnipotency oneiromancy onychomancy paramountcy parturiency percipiency persistency physiciancy physiocracy plantocracy polyvalency preliteracy prepollency proficiency prolificacy prosiliency psephomancy ptochocracy quangocracy refringency respondency rhabdomancy snobbocracy stratocracy subliteracy sufficiency superagency technocracy tephramancy tephromancy totipotency trichromacy turgescency vicegerency