octagonal
/ɑkˈtæɡənəl/
"octagonal" is a 9-letter English headword indexed on PlainSpell.
The verdict
“octagonal” has 13 generated spelling variants in the English index at frequency #44,380. The variants make it a useful spelling check.
- #44,380
- frequency rank, English
- 15,494
- “O” headwords
- 13
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Shaped like an octagon, in having eight sides and eight angles.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | octagonal |
| Language | English |
| Part of speech | Adjective |
| IPA | /ɑkˈtæɡənəl/ |
| Letters | 9 |
| Frequency rank | #44,380 |
| Misspellings tracked | 13 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “octagonal” sits in English frequency
A misspelling magnet
The generator records 13 spelling variants around octagonal (IPA /ɑkˈtæɡənəl/), anadjective. Corpus frequency is #44,380 among 15,494 “O” headwords. Dominant gloss: "Shaped like an octagon, in having eight sides and eight angles.".
Our generated misspelling index lists 13 likely wrong-spelling variants for octagonal, with forms such as "cotagonal", "ocatgonal", and "occtagonal". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 1 confusable-pair relationship, "octagon", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From octagon + -al. The correct English form is octagonal, spelled O-C-T-A-G-O-N-A-L.
Definition
- 1Shaped like an octagon, in having eight sides and eight angles.
Etymology
From octagon + -al.
This word in other languages
Common misspellings
Also misspelled as:
- cotagonal
- ocatgonal
- occtagonal
- octaggonal
- octagnoal
- octagoanl
- octagonall
- octagonla
- octagonnal
- octaognal
- octgaonal
- octtagonal
- otcagonal
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of octagonal - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "octagonal"?
What does "octagonal" mean?
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Using “octagonal”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-C-T-A-G-O-N-A-L - every other letter order is a misspelling in standard orthography.
- Say it as /ɑkˈtæɡənəl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “octagon” - see the side-by-side comparison. octagonal vs octagon
- Browse more English words and confusable pairs in the same reference. English words
Same frequency band
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.