isomorphism

/ˌaɪsə(ʊ)ˈmɔɹfɪzəm/

//ˌaɪsə(ʊ)ˈmɔɹfɪzəm// noun

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

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

The verdict

“isomorphism” is uncommon English (frequency #58,770 among 2,140 “I” headwords), classed as a noun. The kind of spelling people second-guess.

#58,770
frequency rank, English
2,140
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Similarity of form

Corpus desk

Index EN-isomorphism · isomorphism · English

isomorphism · rank #58,770 · 0 variants · 0 confusables

  • FREQ-RARE #58,770
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH invoicing

Nearest frequency peer: invoicing (-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 “isomorphism”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for isomorphism
PropertyValue
Headwordisomorphism
LanguageEnglish
Part of speechNoun
IPA/ˌaɪsə(ʊ)ˈmɔɹfɪzəm/
Letters11
Frequency rank#58,770
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “isomorphism” 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).isomorphismfalls 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: “invoicing” (#58,769), “invective” (#58,768), “Ivanovich” (#58,772). Among 2,140 “I” headwords, “isomorphism” is #58,770. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

isomorphism is uncommon English at frequency #58,770 among 2,140 “I” headwords, classed as anoun, transcribed /ˌaɪsə(ʊ)ˈmɔɹfɪzəm/. Rarity is why readers land here mid-draft. 7 senses are on record.

We couldn't generate a plausible misspelling set for isomorphism, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From iso- + -morphism. The correct English form is isomorphism, spelled I-S-O-M-O-R-P-H-I-S-M.

Definition

  1. 1
    Similarity of form
  2. 2
    Similarity of form
  3. 3
    Similarity of form
  4. 4
    Similarity of form
  5. 5
    A one-to-one correspondence
  6. 6
    A one-to-one correspondence
  7. 7
    A one-to-one correspondence

Recorded use

Wiktionary examples

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

  1. The postulated isomorphism between words and things constitutes the characterizing feature of all philosophically based universal languages.
  2. The isomorphism of compounds does not prove the isomorphism of their respective constituents.

Etymology

From iso- + -morphism.

Synonyms

iso

Antonyms

anisomorphism

This word in other languages

isomorfismo(Español)isomorphisme(Français)Isomorphismus(Deutsch)isomorfismo(Português)

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 "isomorphism"?
"isomorphism" is spelled I-S-O-M-O-R-P-H-I-S-M. The IPA pronunciation is /ˌaɪsə(ʊ)ˈmɔɹfɪzəm/.
What does "isomorphism" mean?
As a noun, "isomorphism" means: Similarity of form
How do you pronounce "isomorphism"?
The IPA (International Phonetic Alphabet) transcription for "isomorphism" is /ˌaɪsə(ʊ)ˈmɔɹfɪzəm/. 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 "isomorphism"?
From iso- + -morphism. 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 "isomorphism", not the corpus desk frequency band.

Same letter count

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

illuminator#58,759forevermore#58,703filmography#58,693Monongahela#58,864

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

Source: FrequencyWords open word-frequency list