Mammoth Uncensored Word List:
19 words that are 20 letters long beginning with e in the mammoth uncensored word list.

electrocardiographic electroencephalogram electrogalvanization electrohydraulically electroluminescences electrometallurgical electrometallurgists electrooculographies electrophotographies electrophysiological electrophysiologists electroretinographic encephalomyocarditis endophotocoagulation episioperineorrhaphy ethnomusicologically existentialistically expressionlessnesses extemporaneousnesses