immovable vs immutable, What's the Difference?

Which to use

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

#37,982
“immovable” frequency rank: #34,930
“immutable” frequency rank: 72912
confusion score

Side-by-Side Comparison

Feature	immovable	immutable
Definition	incapable of being physically moved; fixed	Unable to be changed without exception.

Letter map: immovable vs immutable

Shared letters muted; letters that set immovable and immutable apart highlighted. Shared run: 7.

9 ch

immovable

9 ch

immutable

Spelling & dictionary notes on immovable vs immutable

immovable and immutable 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 share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 72912, derived from the frequency rank of both members and their visual similarity.

immovable is recorded at frequency rank #37,982, classified as anadj, pronounced /ɪˈmuːvəb(ə)l/. immutable is at rank #34,930, tagged as anadj.

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 72912, this pair ranks #41,402 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of immovable vs immutable

Shared letters: abeilm. Private to "immovable": ov. Private to "immutable": tu.

"immovable" · 9 letters · shape VCCVCVCCV · "immutable" · 9 letters · shape VCCVCVCCV

Known mistypes of this pair

immovable ← immoavble · immovabble · immovabel · immovablle · immovalbe · immovbale · immovible · immovvable
immutable ← immtuable · immuatble · immutabble · immutabel · immutablle · immutalbe · immutbale · immutible

Frequently Asked Questions

Is swapping "immovable" for "immutable" ever safe?

No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "immovable" or "immutable"?

"immutable" is the more common of the two: it sits at frequency rank #34,930 in our English list, against #37,982 for "immovable". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "immovable" and "immutable". Here's where to go from here.

Full dictionary entry for "immovable" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "immutable" - compare definitions side by side with the headword page. Word entry
This pair ranks #41,402 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
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 #41,402 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.