sesquipedalian

Adjective

• (of words) long and ponderous; having many syllables
  • sesquipedalian technical terms
    

• given to the overuse of long words
  • sesquipedalian orators
    
  • this sesquipedalian way of saying one has no money
    

Noun

• a very long word (a foot and a half long)

Related words

• Synonyms: 
  polysyllabic , sesquipedalia