confocal

/kənˈfəʊkəl/

//kənˈfəʊkəl// adj

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

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

The verdict

“confocal” is uncommon English (frequency #72,199 among 5,599 “C” headwords), classed as an adjective. The kind of spelling people second-guess.

#72,199
frequency rank, English
5,599
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Having the same foci

Corpus desk

Index EN-confocal · confocal · English

confocal · rank #72,199 · 0 variants · 0 confusables

  • FREQ-RARE #72,199
  • LEN-LONG 8 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH comradeship

Nearest frequency peer: comradeship (-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 “confocal”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “confocal” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for confocal
PropertyValue
Headwordconfocal
LanguageEnglish
Part of speechAdjective
IPA/kənˈfəʊkəl/
Letters8
Frequency rank#72,199
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “confocal” in English

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

#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. Rare peers in the same band: “comradeship” (#72,198), “commentate” (#72,196), “combinatorics” (#72,195). Among 5,599 “C” headwords, “confocal” is #72,199. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

confocal is uncommon English at frequency #72,199 among 5,599 “C” headwords, classed as anadjective, transcribed /kənˈfəʊkəl/. Rarity is why readers land here mid-draft. Gloss: "Having the same foci".

Our edit-distance generator produced no likely misspellings for confocal, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From con- + focal. The correct English form is confocal, spelled C-O-N-F-O-C-A-L.

Definition

  1. 1
    Having the same foci

Etymology

From con- + focal.

This word in other languages

confocal(Français)

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 "confocal"?
"confocal" is spelled C-O-N-F-O-C-A-L. The IPA pronunciation is /kənˈfəʊkəl/.
What does "confocal" mean?
As an adjective, "confocal" means: Having the same foci
How do you pronounce "confocal"?
The IPA (International Phonetic Alphabet) transcription for "confocal" is /kənˈfəʊkəl/. 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 "confocal"?
From con- + focal. 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 "confocal", not the corpus desk frequency band.

Same letter count

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

Cornhill#72,207cinnabar#72,185chalking#72,176centring#72,175

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

Source: FrequencyWords open word-frequency list