pentagonal
/pɛnˈtæɡənəl/
"pentagonal" is a 10-letter English headword indexed on PlainSpell.
The verdict
“pentagonal” is uncommon English (frequency #86,621 among 4,417 “P” headwords), classed as an adjective. The kind of spelling people second-guess.
- #86,621
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Of, relating to, or shaped like a pentagon.
Corpus desk
Index EN-pentagonal · pentagonal · English
pentagonal · rank #86,621 · 0 variants · 0 confusables
- FREQ-RARE #86,621
- LEN-MEGA 10 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH pedicel
Nearest frequency peer: pedicel (-1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “pentagonal”
Sparse band: bars invert rank so rarer forms read shorter
- passivation
passivation
13,385 corpus weight
- Payal
Payal
13,384 corpus weight
- pedicel
pedicel
13,381 corpus weight
- pentagonal
pentagonal
13,380 corpus weight
- peremptory
peremptory
13,378 corpus weight
- Peto
Peto
13,375 corpus weight
What this shows Long-tail view: where “pentagonal” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | pentagonal |
| Language | English |
| Part of speech | Adjective |
| IPA | /pɛnˈtæɡənəl/ |
| Letters | 10 |
| Frequency rank | #86,621 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “pentagonal” in English
Rare enough to double-check
pentagonal is uncommon English at frequency #86,621 among 4,417 “P” headwords, classed as anadjective, transcribed /pɛnˈtæɡənəl/. Rarity is why readers land here mid-draft. Gloss: "Of, relating to, or shaped like a pentagon.".
No generated misspelling entries exist for pentagonal in our index, since its letter sequence doesn't invite the usual edit-distance slips. No close-neighbour confusable shows up for this headword in our 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 pentagon + -al. The correct English form is pentagonal, spelled P-E-N-T-A-G-O-N-A-L.
Definition
- 1Of, relating to, or shaped like a pentagon.
Recorded use
Wiktionary examplesThese source excerpts show how pentagonal appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
If the base be a triangle, it is called a triangular prism; if a square, a square prism; if a pentagon, a pentagonal prism; and' if the base is any irregular figure, it is called an irregular prism : ...
Seed micromorphology:—Seed coat is laticostate. Epidermal cells are elliptical to irregularly pentagonal. Cell walls are thickened mostly at the corners, the boundaries are raised […]
Etymology
From pentagon + -al.
This word in other languages
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "pentagonal", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).