enneagon

/ˈɛ.niː.ə.ɡən/

//ˈɛ.niː.ə.ɡən// noun

By · According to Wiktionary data (CC BY-SA) ·

"enneagon" is a 8-letter English headword indexed on PlainSpell.

The verdict

“enneagon” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A polygon with nine sides; a nonagon.

Key facts for enneagon
PropertyValue
Headwordenneagon
LanguageEnglish
Part of speechNoun
IPA/ˈɛ.niː.ə.ɡən/
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “enneagon” sits in English frequency

enneagon falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

enneagon is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈɛ.niː.ə.ɡən/. Rarity is why readers land here mid-draft. Gloss: "A polygon with nine sides; a nonagon.".

No misspelling variants are generated for enneagon in our index, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From ennea- + -gon. The correct English form is enneagon, spelled E-N-N-E-A-G-O-N.

Definition

  1. 1
    A polygon with nine sides; a nonagon.

Etymology

From ennea- + -gon.

Synonyms

9-gonnonagonnonangle

This word in other languages

eneágono(Español)ennéagone(Français)Neuneck(Deutsch)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "enneagon"?
"enneagon" is spelled E-N-N-E-A-G-O-N. The IPA pronunciation is /ˈɛ.niː.ə.ɡən/.
What does "enneagon" mean?
As a noun, "enneagon" means: A polygon with nine sides; a nonagon.
How do you pronounce "enneagon"?
The IPA (International Phonetic Alphabet) transcription for "enneagon" is /ˈɛ.niː.ə.ɡən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "enneagon"?
From ennea- + -gon. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “enneagon”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is E-N-N-E-A-G-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈɛ.niː.ə.ɡən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list