assure

/əˈʃɔː(ɹ)/

//əˈʃɔː(ɹ)// verb

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

"assure" is a 6-letter English headword indexed on PlainSpell.

The verdict

“assure” has 6 generated spelling variants in the English index at frequency #6,438. The variants make it a useful spelling check.

#6,438
frequency rank, English
3,931
“A” headwords
6
tracked misspellings
12
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To make sure and secure; ensure.

Corpus desk

Index EN-assure · assure · English

assure · rank #6,438 · 6 variants · 12 confusables

  • FREQ-COMMON #6,438
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-MID 12 pairs
  • VAR-MID 6 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH ashamed

Nearest frequency peer: ashamed (-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 “assure”

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

corpus weight

What this shows “assure” 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).

assure vs azure
67% similar
assure vs astute
67% similar
assure vs assured
86% similar

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

Key facts for assure
PropertyValue
Headwordassure
LanguageEnglish
Part of speechVerb
IPA/əˈʃɔː(ɹ)/
Letters6
Frequency rank#6,438
Misspellings tracked6
Confusable pairs12
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “assure”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).assurelands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “ashamed” (#6,437), “bailey” (#6,439), “AR” (#6,436). Among 3,931 “A” headwords, “assure” is #6,438. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 6 spelling variants around assure (IPA /əˈʃɔː(ɹ)/), averb. Corpus frequency is #6,438 among 3,931 “A” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 6 likely wrong-spelling variants for assure, with forms such as "assrue", "assuer", and "assurre". 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 12 confusable-pair relationships, "azure", "astute", "assured", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: From Old French asseurer (Modern French assurer), from Latin ad- + securus (“secure”). Cognate with Spanish asegurar. Doublet of assecure. The correct English form is assure, spelled A-S-S-U-R-E.

Definition

  1. 1
    To make sure and secure; ensure.
  2. 2
    To give (someone) confidence in the trustworthiness of (something).
  3. 3
    To guarantee, promise (to do something).
  4. 4
    To reassure.

Recorded use

Wiktionary examples

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

  1. I assure you that the program will work smoothly when we demonstrate it to the client.
  2. He assured of his commitment to her happiness.

Etymology

From Old French asseurer (Modern French assurer), from Latin ad- + securus (“secure”). Cognate with Spanish asegurar. Doublet of assecure.

This word in other languages

asegurar(Español)assurer(Français)sichern(Deutsch)assegurar(Português)

Common misspellings

Also misspelled as:

  • assrue
  • assuer
  • assurre
  • asure
  • asusre
  • sasure

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of assure - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

assrue2assuer2assurre1asure1asusre2sasure2
Edit distance from "assure"

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 "assure"?
"assure" is spelled A-S-S-U-R-E. The IPA pronunciation is /əˈʃɔː(ɹ)/.
What does "assure" mean?
As a verb, "assure" means: To make sure and secure; ensure.
What words are commonly confused with "assure"?
"assure" is commonly confused with "azure", "astute", "assured". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "assure"?
The IPA (International Phonetic Alphabet) transcription for "assure" is /əˈʃɔː(ɹ)/. 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 "assure"?
From Old French asseurer (Modern French assurer), from Latin ad- + securus (“secure”). Cognate with Spanish asegurar. Doublet of assecure. 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 "assure", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

bailey#6,439ballot#6,440wounds#6,428valued#6,427

Similar misspelling depth

Headwords with a similar count of attested misspellings (6 here; floor ≥5).

cheer6 variantstops6 variantsspan6 variantsscan6 variants

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

Source: FrequencyWords open word-frequency list