18 letter adjectives that contain O

We have listed 22 18-letter adjectives that contain O for you in this WordMom word list. All these 18-letter adjectives that contain O were verified by specialists in the English language.

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  • adenocarcinomatous
  • anticonstitutional
  • chemotherapeutical
  • chromolithographic
  • crystallographical
  • fibrocartilaginous
  • hydrometallurgical
  • internationalistic
  • intercartilaginous
  • noninterchangeable
  • neurophysiological
  • neuropsychological
  • nonprognosticative
  • psychopathological
  • pepsinhydrochloric
  • phanerocrystalline
  • parallelogrammatic
  • parallelogrammical
  • pseudoneuropterous
  • semiphlogisticated
  • trachelobranchiate
  • ultranationalistic