extensiblevsextensiveWhich spelling fits?

Which to use

“extensible” and “extensive” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#49,911
“extensible” frequency rank
#3,056
“extensive” frequency rank
52967
confusion score

Side-by-Side Comparison

Feature extensible extensive
Definition Capable of being extended. Having a great extent; covering a large area; vast.

Letter map: extensible vs extensive

Shared letters muted; letters that set extensible and extensive apart highlighted. Shared run: 8.

10 ch
extensible
9 ch
extensive

Corpus notes: extensible and extensive

extensible and extensive are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 52967, derived from the frequency rank of both members and their visual similarity.

extensible is recorded at frequency rank #49,911, classified as anadj. extensive is at rank #3,056, tagged as anadj, pronounced /ɪkˈstɛn.sɪv/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 52967, this pair ranks #152,748 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of extensible vs extensive

Shared letters: einstx. Private to "extensible": bl. Private to "extensive": v.

"extensible" · 10 letters · shape VCCVCCVCCV  ·  "extensive" · 9 letters · shape VCCVCCVCV

Known mistypes of this pair

  • extensibleetxensible · exetnsible · extenisble · extennsible · extensable · extensbile · extensibble · extensibel
  • extensiveetxensive · exetnsive · extenisve · extennsive · extensiev · extensivve · extenssive · extensvie

Frequently Asked Questions

Do "extensible" and "extensive" mean the same thing in a sentence?
No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Frequency check: "extensible" vs "extensive" - which ranks higher?
"extensive" is the more common of the two: it sits at frequency rank #3,056 in our English list, against #49,911 for "extensible". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Pair "extensible" vs "extensive" is on the table, pick a follow-up below.

  • Full dictionary entry for "extensible" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "extensive" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #152,748 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "extensible" and "extensive" also get mixed up with nearby pairs, the highest-scored neighbour is "expansive vs extensive". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #152,748 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list