extensibility

/ɛkˌstɛn.səˈbɪ.lə.ti/

//ɛkˌstɛn.səˈbɪ.lə.ti// noun

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

"extensibility" is a 13-letter English headword indexed on PlainSpell.

The verdict

“extensibility” is uncommon English (frequency #84,232 among 18,836 “E” headwords), classed as a noun. The kind of spelling people second-guess.

#84,232
frequency rank, English
18,836
“E” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The capability of being extended

Key facts for extensibility
PropertyValue
Headwordextensibility
LanguageEnglish
Part of speechNoun
IPA/ɛkˌstɛn.səˈbɪ.lə.ti/
Letters13
Frequency rank#84,232
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “extensibility” 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). extensibility 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

extensibility is uncommon English at frequency #84,232 among 18,836 “E” headwords, classed as anoun, transcribed /ɛkˌstɛn.səˈbɪ.lə.ti/. Rarity is why readers land here mid-draft. 2 senses are on record.

Our edit-distance generator produced no likely misspellings for extensibility, a sign its spelling follows regular English conventions. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From extensible + -ity. The correct English form is extensibility, spelled E-X-T-E-N-S-I-B-I-L-I-T-Y.

Definition

  1. 1
    The capability of being extended
  2. 2
    A quality of design that takes possible future advances into consideration and attempts to accommodate them

Etymology

From extensible + -ity.

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 "extensibility"?
"extensibility" is spelled E-X-T-E-N-S-I-B-I-L-I-T-Y. The IPA pronunciation is /ɛkˌstɛn.səˈbɪ.lə.ti/.
What does "extensibility" mean?
As a noun, "extensibility" means: The capability of being extended
How do you pronounce "extensibility"?
The IPA (International Phonetic Alphabet) transcription for "extensibility" is /ɛkˌstɛn.səˈbɪ.lə.ti/. 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 "extensibility"?
From extensible + -ity. 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 “extensibility”

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

  • The one correct English spelling is E-X-T-E-N-S-I-B-I-L-I-T-Y - every other letter order is a misspelling in standard orthography.
  • Say it as /ɛkˌstɛn.səˈbɪ.lə.ti/ (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