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 17,902 “I” headwords), classed as a noun. The kind of spelling people second-guess.

#58,770
frequency rank, English
17,902
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Similarity of form

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)

Where “isomorphism” 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). isomorphism 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

isomorphism is uncommon English at frequency #58,770 among 17,902 “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

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.

Using “isomorphism”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is I-S-O-M-O-R-P-H-I-S-M - every other letter order is a misspelling in standard orthography.
  • Say it as /ˌaɪsə(ʊ)ˈmɔɹfɪzəm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this 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 FrequencyWords open word-frequency list