Longest English words in which no letter appears more than once

Dermatoglyphics, misconjugatedly, and uncopyrightable, each fifteen letters long, are the longest English words in which no letter appears more than once. Fourteen letter words with this property are ambidextrously, benzhydroxamic, hydromagnetics, hydropneumatic, pseudomythical, schizotrypanum, sulphogermanic, troublemakings, undiscoverably, and vesiculography.