Mammoth Uncensored Word List:
32 words ending with ce, 15 letters long

anticoincidence bioluminescence claircognizance clairolfactance counterevidence counterfeisance counterfesaunce counterinstance counterviolence hypersomnolence improvvisatrice ineffervescence interdependence macroturbulence misintelligence nonindependence nonintelligence noninterference nonobsolescence nontransference omnibenevolence phosphorescence photoresistance preacquaintance reconvalescence subintelligence superconfidence superexcellence superincumbence superintendence thermoremanence videoconference