diameter

/daɪˈæmɪtə(ɹ)/

//daɪˈæmɪtə(ɹ)// noun

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

"diameter" is a 8-letter English headword indexed on PlainSpell.

The verdict

“diameter” has 11 generated spelling variants in the English index at frequency #6,230. The variants make it a useful spelling check.

#6,230
frequency rank, English
3,470
“D” headwords
11
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle; a chord that passes through the center of the circle.

Corpus desk

Index EN-diameter · diameter · English

diameter · rank #6,230 · 11 variants · 2 confusables

  • FREQ-COMMON #6,230
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-MID 11 variants
  • BOOK-MID 3,470
  • PHOTO-FINISH contributing

Nearest frequency peer: contributing (-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 “diameter”

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

corpus weight

What this shows “diameter” 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).

diameter vs dieter
75% similar
diameter vs diabetes
75% similar

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

Key facts for diameter
PropertyValue
Headworddiameter
LanguageEnglish
Part of speechNoun
IPA/daɪˈæmɪtə(ɹ)/
Letters8
Frequency rank#6,230
Misspellings tracked11
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “diameter”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).diameterlands 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 “contributing” (#6,229), “Dubai” (#6,231), “contractor” (#6,228). Among 3,470 “D” headwords, “diameter” is #6,230. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 11 spelling variants around diameter (IPA /daɪˈæmɪtə(ɹ)/), anoun. Corpus frequency is #6,230 among 3,470 “D” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 11 likely wrong-spelling variants for diameter, with forms such as "daimeter", "ddiameter", and "diaemter". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 2 confusable-pair relationships, "dieter", "diabetes", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Old French diametre (French diamètre), from Latin diametros, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”). By surface analysis, dia- + -meter. The correct English form is diameter, spelled D-I-A-M-E-T-E-R.

Definition

  1. 1
    Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle; a chord that passes through the center of the circle.
  2. 2
    The length of such a line.
  3. 3
    The maximum distance between any two points in a metric space.
  4. 4
    The maximum eccentricity over all vertices in a graph.

Recorded use

Wiktionary examples

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

  1. In cases without good face contact, the diameter of the toolholder at the front of the flange or the tool itself should not be any larger than the gage diameter of the toolholder shank from a bending stiffness viewpoint.
  2. Viable non-malformed singleton pregnancies were selected for cerebellar measurements; transcerebellar diameter, (TCD), left and right cerebellar diameters (LCD, RCD).

Etymology

From Old French diametre (French diamètre), from Latin diametros, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”). By surface analysis, dia- + -meter.

This word in other languages

diámetro(Español)diamètre(Français)Durchmesser(Deutsch)diâmetro(Português)

Common misspellings

Also misspelled as:

  • daimeter
  • ddiameter
  • diaemter
  • diameetr
  • diameterr
  • diametre
  • diametter
  • diammeter
  • diamteer
  • dimaeter
  • idameter

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of diameter - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

daimeter2ddiameter1diaemter2diameetr2diameterr1diametre2diametter1diammeter1
Edit distance from "diameter"

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 "diameter"?
"diameter" is spelled D-I-A-M-E-T-E-R. The IPA pronunciation is /daɪˈæmɪtə(ɹ)/.
What does "diameter" mean?
As a noun, "diameter" means: Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle; a chord that passes through the center of the circle.
What words are commonly confused with "diameter"?
"diameter" is commonly confused with "dieter", "diabetes". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "diameter"?
The IPA (International Phonetic Alphabet) transcription for "diameter" is /daɪˈæmɪtə(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 "diameter"?
From Old French diametre (French diamètre), from Latin diametros, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”). By surface analysis, d... 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 "diameter", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

dynamics#6,235elephant#6,236enhanced#6,237fabulous#6,241

Similar misspelling depth

Headwords with a similar count of attested misspellings (11 here; floor ≥5).

fathers11 variantsglorious11 variantslacking11 variantsteenager11 variants

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

Source: FrequencyWords open word-frequency list