1. Not possible to classify

See also: unidentifiable

• eternity
• eternize
• ETF
• eth
• ethacrynic acid
• Ethan Allen
• ethanal
• ethanal trimer
• ethanamide
• ethane
• ethanedioic acid
• ethanediol
• ethanoate
• ethanoic acid
• ethanol
• ethanoyl chloride
• ethanoyl group
• ethanoyl radical
• ethchlorvynol
• Ethel Barrymore
• Ethel Merman
• Ethel Waters
• Ethelbert
• Ethelred
• Ethelred I