Mammoth Uncensored Word List:
50 - 18 letter words starting with co

coccidioidomycoses coccidioidomycosis collectivistically commensurabilities commercialisations commercializations communicablenesses companionabilities compartmentalising compartmentalizing comprehensibleness conceptualisations conceptualizations congregationalisms congregationalists consequentialities conservativenesses constitutionalisms constitutionalists constitutionalized constitutionalizes constructivenesses consubstantiations contemptiblenesses contemptuousnesses contradistinctions conversationalists cotemporaneousness counteraccusations counteradaptations counteradvertising counteraggressions counterconventions counterculturalism counterdemonstrate counterdeployments countereducational countergovernments counterinfluencing counterinstitution counterintuitively counterpetitioning counterprogramming counterpropagandas counterquestioning counterreformation counterretaliation counterrevolutions counterstrategists countersuggestions