improbability
/ɪmˌpɹɒb.əˈbɪl.ɪ.ti/
"improbability" is a 13-letter English headword indexed on PlainSpell.
The verdict
“improbability” is uncommon English (frequency #76,872 among 2,140 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #76,872
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The quality or state of being improbable; unlikelihood.
Corpus desk
Index EN-improbability · improbability · English
improbability · rank #76,872 · 0 variants · 0 confusables
- FREQ-RARE #76,872
- LEN-MEGA 13 letters
- VOW-6 6 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH igniter
Nearest frequency peer: igniter (-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 “improbability”
Sparse band: bars invert rank so rarer forms read shorter
- Hyslop
Hyslop
23,133 corpus weight
- igniter
igniter
23,130 corpus weight
- improbabili…
improbability
23,129 corpus weight
- Imtiaz
Imtiaz
23,128 corpus weight
- inactivate
inactivate
23,127 corpus weight
- indecisiven…
indecisiveness
23,126 corpus weight
What this shows Long-tail view: where “improbability” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | improbability |
| Language | English |
| Part of speech | Noun |
| IPA | /ɪmˌpɹɒb.əˈbɪl.ɪ.ti/ |
| Letters | 13 |
| Frequency rank | #76,872 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “improbability” in English
Rare enough to double-check
improbability is uncommon English at frequency #76,872 among 2,140 “I” headwords, classed as anoun, transcribed /ɪmˌpɹɒb.əˈbɪl.ɪ.ti/. Rarity is why readers land here mid-draft. 2 senses are on record.
improbability doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. No confusable counterpart is on file for this word, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From im- + probability. The correct English form is improbability, spelled I-M-P-R-O-B-A-B-I-L-I-T-Y.
Definition
- 1The quality or state of being improbable; unlikelihood.
- 2That which is improbable; an improbable event or result.
Recorded use
Wiktionary exampleThese source excerpts show how improbability appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
"I really," returned the other with a sneer, "cannot agree about probabilities or improbabilities, but I know what the generality will think when they see a gentleman constantly with five very pretty girls, and I also know what they will say."
Etymology
From im- + probability.
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 "improbability", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 13 letters (nearest by frequency rank).