Longest English Words

Below is a list of the Longest words used in the Oxford Dictionary.
  • Pneumonoultramicroscopicsilicovolcanoconiosis (45 letters) - a lung disease.
  • supercalifragilisticexpialidocious (34 Letters) - a word used when you have nothing to say. Not in all dictionaries.
  • Pseudopseudohypoparathyroidism (30 letters) - An inherited disorder, named for its similarity to pseudohypoparathyroidism in presentation.
  • Floccinaucinihilipilification (29 letters) - The estimation of something as having no value.
  • Antidisestablishmentarianism (28 letters) - Any opposition to withdrawing government support of a church or religion.
  • Incomprehensibilities (21) - (incomprehensible) impossible to understand