perspex
"perspex" is a 7-letter English headword indexed on PlainSpell.
The verdict
“perspex” is uncommon English (frequency #71,001 among 4,417 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #71,001
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - Any tough, transparent plastic that is used instead of glass for windows.
Corpus desk
Index EN-perspex · perspex · English
perspex · rank #71,001 · 0 variants · 0 confusables
- FREQ-RARE #71,001
- LEN-LONG 7 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH penumbra
Nearest frequency peer: penumbra (-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.
Frequency neighbourhood for “perspex”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- pedometer
pedometer
29,004 corpus weight
- Pendle
Pendle
29,003 corpus weight
- penitence
penitence
29,002 corpus weight
- penumbra
penumbra
29,001 corpus weight
- perspex
perspex
29,000 corpus weight
- philatelic
philatelic
28,998 corpus weight
What this shows Bars show where “perspex” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | perspex |
| Language | English |
| Part of speech | Noun |
| Letters | 7 |
| Frequency rank | #71,001 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “perspex” sits in English frequency
Rare enough to double-check
perspex is uncommon English at frequency #71,001 among 4,417 “P” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Any tough, transparent plastic that is used instead of glass for windows.".
No generated misspelling entries exist for perspex in our index, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From the proprietary name Perspex. The correct English form is perspex, spelled P-E-R-S-P-E-X.
Definition
- 1Any tough, transparent plastic that is used instead of glass for windows.
Etymology
From the proprietary name Perspex.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "perspex", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).
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.