13-letter words starting with octo
- octocentenary — pertaining to 800 or a period of 800 years; marking the completion of 800 years.
- octodecillion — a cardinal number represented in the U.S. by 1 followed by 57 zeros, and in Great Britain by 1 followed by 108 zeros.
- octogenarians — Plural form of octogenarian.
- octosyllables — Plural form of octosyllable.
On this page, we collect all 13-letter words starting with OCTO. It’s easy to find right word with a certain length. It is the easiest way to find 13-letter word that beginning with OCTO to use in Scrabble or Crossword puzzles.