23 letter words, grouped by first letter

  • carboxymethylcelluloses

  • deinstitutionalizations
  • dichlorodifluoromethane

  • electroencephalographer
  • electroencephalographic

  • hexamethylenetetramines

  • indistinguishablenesses
  • intersubstitutabilities

  • microspectrophotometers
  • microspectrophotometric

  • nonrepresentationalisms

  • overintellectualization

  • reinstitutionalizations