Poisson

/ˈpwɑː.sɒn/

//ˈpwɑː.sɒn// name

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

"poisson" is a 7-letter English headword indexed on PlainSpell.

The verdict

“Poisson” has 7 generated spelling variants in the English index at frequency #39,033. The variants make it a useful spelling check.

#39,033
frequency rank, English
4,417
“P” headwords
7
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A surname in French

Corpus desk

Index EN-poisson · Poisson · English

Poisson · rank #39,033 · 7 variants · 3 confusables

  • FREQ-MID #39,033
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 7 variants
  • BOOK-MID 4,417
  • PHOTO-FINISH Polynesia

Nearest frequency peer: Polynesia (+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.

Rank peers near misspelling magnet “Poisson”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “Poisson” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

Poisson vs prison
57% similar
Poisson vs poison
71% similar
Poisson vs piston
57% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for Poisson
PropertyValue
HeadwordPoisson
LanguageEnglish
Part of speechProper noun
IPA/ˈpwɑː.sɒn/
Letters7
Frequency rank#39,033
Misspellings tracked7
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “Poisson”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).Poissonlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “Polynesia” (#39,034), “plebiscite” (#39,031), “polyurethane” (#39,035). Among 4,417 “P” headwords, “Poisson” is #39,033. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 7 spelling variants around Poisson (IPA /ˈpwɑː.sɒn/), aproper noun. Corpus frequency is #39,033 among 4,417 “P” headwords. Dominant gloss: "A surname in French".

Our generated misspelling index lists 7 likely wrong-spelling variants for Poisson, with forms such as "opisson", "piosson", and "poisosn". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 3 confusable-pair relationships, "prison", "poison", "piston", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Unadapted borrowing from French Poisson. The noun sense is named after French mathematician Siméon Denis Poisson (1781–1840). The correct English form is Poisson, spelled P-O-I-S-S-O-N.

Definition

  1. 1
    A surname in French

Etymology

Unadapted borrowing from French Poisson. The noun sense is named after French mathematician Siméon Denis Poisson (1781–1840).

Common misspellings

Also misspelled as:

  • opisson
  • piosson
  • poisosn
  • poissno
  • poissonn
  • posison
  • ppoisson

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of Poisson - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

opisson2piosson2poisosn2poissno2poissonn1posison2ppoisson1
Edit distance from "Poisson"

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 "Poisson"?
"Poisson" is spelled P-O-I-S-S-O-N. The IPA pronunciation is /ˈpwɑː.sɒn/.
What does "Poisson" mean?
As a proper noun, "Poisson" means: A surname in French
What words are commonly confused with "Poisson"?
"Poisson" is commonly confused with "prison", "poison", "piston". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "Poisson"?
The IPA (International Phonetic Alphabet) transcription for "Poisson" is /ˈpwɑː.sɒn/. 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 "Poisson"?
Unadapted borrowing from French Poisson. The noun sense is named after French mathematician Siméon Denis Poisson (1781–1840). 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "Poisson", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

planing#39,030pillage#39,028protégé#39,040Pentium#39,023

Similar misspelling depth

Headwords with a similar count of attested misspellings (7 here; floor ≥5).

posit7 variantsqueued7 variantsRahim7 variantspeddle7 variants

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

Source: FrequencyWords open word-frequency list