uncertainty

/ʌnˈsɜːtənti/

//ʌnˈsɜːtənti// noun

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

"uncertainty" is a 11-letter English headword indexed on PlainSpell.

The verdict

“uncertainty” has 17 generated spelling variants in the English index at frequency #6,852. The variants make it a useful spelling check.

#6,852
frequency rank, English
1,433
“U” headwords
17
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Doubt; the condition of being uncertain or without conviction.

Corpus desk

Index EN-uncertainty · uncertainty · English

uncertainty · rank #6,852 · 17 variants · 1 confusable

  • FREQ-COMMON #6,852
  • LEN-MEGA 11 letters
  • VOW-5 5 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 17 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH trunk

Nearest frequency peer: trunk (-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 “uncertainty”

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

corpus weight

What this shows “uncertainty” 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).

uncertainty vs uncertain
82% similar

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

Key facts for uncertainty
PropertyValue
Headworduncertainty
LanguageEnglish
Part of speechNoun
IPA/ʌnˈsɜːtənti/
Letters11
Frequency rank#6,852
Misspellings tracked17
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “uncertainty”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).uncertaintylands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “trunk” (#6,851), “vampire” (#6,853), “tribes” (#6,850). Among 1,433 “U” headwords, “uncertainty” is #6,852. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 17 spelling variants around uncertainty (IPA /ʌnˈsɜːtənti/), anoun. Corpus frequency is #6,852 among 1,433 “U” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 17 likely wrong-spelling variants for uncertainty, with forms such as "nucertainty", "ucnertainty", and "unccertainty". 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 1 confusable-pair relationship, "uncertain", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English uncerteynte; equivalent to un- + certainty or uncertain + -ty. The correct English form is uncertainty, spelled U-N-C-E-R-T-A-I-N-T-Y.

Definition

  1. 1
    Doubt; the condition of being uncertain or without conviction.
  2. 2
    Something uncertain or ambiguous.
  3. 3
    A parameter that measures the dispersion of a range of measured values.

Recorded use

Wiktionary examples

These source excerpts show how uncertainty appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. “Well,” I answered, at first with uncertainty, then with inspiration, “he would do splendidly to lead your cotillon, if you think of having one.” ¶ “So you do not dance, Mr. Crocker?” ¶ I was somewhat set back by her perspicuity.
  2. After spending so much of the season looking upwards, the swashbuckling style and swagger of early season Spurs was replaced by uncertainty and frustration against a Norwich side who had the quality and verve to take advantage

Etymology

From Middle English uncerteynte; equivalent to un- + certainty or uncertain + -ty.

Synonyms

uncertainness

Antonyms

certainty

This word in other languages

incertidumbre(Español)incertitude(Français)Unsicherheit(Deutsch)incerteza(Português)

Common misspellings

Also misspelled as:

  • nucertainty
  • ucnertainty
  • unccertainty
  • unceratinty
  • uncerrtainty
  • uncertainnty
  • uncertaintty
  • uncertaintyy
  • uncertainyt
  • uncertaitny
  • uncertanity
  • uncertianty
  • uncerttainty
  • uncetrainty
  • uncretainty
  • unecrtainty
  • unncertainty

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of uncertainty - 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.

nucertainty2ucnertainty2unccertainty1unceratinty2uncerrtainty1uncertainnty1uncertaintty1uncertaintyy1
Edit distance from "uncertainty"

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 "uncertainty"?
"uncertainty" is spelled U-N-C-E-R-T-A-I-N-T-Y. The IPA pronunciation is /ʌnˈsɜːtənti/.
What does "uncertainty" mean?
As a noun, "uncertainty" means: Doubt; the condition of being uncertain or without conviction.
What words are commonly confused with "uncertainty"?
"uncertainty" is commonly confused with "uncertain". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "uncertainty"?
The IPA (International Phonetic Alphabet) transcription for "uncertainty" is /ʌnˈsɜːtənti/. 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 "uncertainty"?
From Middle English uncerteynte; equivalent to un- + certainty or uncertain + -ty. 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 "uncertainty", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

accommodate#6,857accordingly#6,858continental#6,886convenience#6,887

Similar misspelling depth

Headwords with a similar count of attested misspellings (17 here; floor ≥5).

flexibility17 variantsidentifying17 variantsfunctioning17 variantsprobability17 variants

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

Source: FrequencyWords open word-frequency list