Hausdorff

/ˈhaʊs.dɔːf/

//ˈhaʊs.dɔːf// adj

"hausdorff" is a 9-letter English headword indexed on PlainSpell.

The verdict

“Hausdorff” is uncommon English (frequency #94,935 among 23,837 “H” headwords), classed as an adjective. The kind of spelling people second-guess.

#94,935
frequency rank, English
23,837
“H” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Such that any two distinct points have disjoint neighborhoods.

Corpus desk

Index EN-hausdorff · Hausdorff · English

Hausdorff · rank #94,935 · 0 variants · 0 confusables

  • FREQ-RARE #94,935
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 23,837
  • PHOTO-FINISH Haug

Nearest frequency peer: Haug (-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.

Frequency neighbourhood for “Hausdorff”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “Hausdorff” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of May 6, 2026
Key facts for Hausdorff
PropertyValue
HeadwordHausdorff
LanguageEnglish
Part of speechAdjective
IPA/ˈhaʊs.dɔːf/
Letters9
Frequency rank#94,935
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “Hausdorff” sits in English frequency

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

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Hausdorff is uncommon English at frequency #94,935 among 23,837 “H” headwords, classed as anadjective, transcribed /ˈhaʊs.dɔːf/. Rarity is why readers land here mid-draft. Gloss: "Such that any two distinct points have disjoint neighborhoods.".

No generated misspelling entries exist for Hausdorff in our index, suggesting the orthography follows predictable English patterns. No close-neighbour confusable shows up for this headword in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: Named after German mathematician Felix Hausdorff (1868–1942). The correct English form is Hausdorff, spelled H-A-U-S-D-O-R-F-F.

Definition

  1. 1
    Such that any two distinct points have disjoint neighborhoods.

Etymology

Named after German mathematician Felix Hausdorff (1868–1942).

Synonyms

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.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "Hausdorff"?
"Hausdorff" is spelled H-A-U-S-D-O-R-F-F. The IPA pronunciation is /ˈhaʊs.dɔːf/.
What does "Hausdorff" mean?
As an adjective, "Hausdorff" means: Such that any two distinct points have disjoint neighborhoods.
How do you pronounce "Hausdorff"?
The IPA (International Phonetic Alphabet) transcription for "Hausdorff" is /ˈhaʊs.dɔːf/. 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 "Hausdorff"?
Named after German mathematician Felix Hausdorff (1868–1942). 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 "Hausdorff", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list