nonimmutable

adj

"nonimmutable" is a 12-letter English headword indexed on PlainSpell.

The verdict

“nonimmutable” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
12
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not immutable.

Corpus desk

Index EN-nonimmutable · nonimmutable · English

nonimmutable · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "N" thin
  • PHOTO-UNK Peer pending

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.

Key facts for nonimmutable
PropertyValue
Headwordnonimmutable
LanguageEnglish
Part of speechAdjective
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “nonimmutable” in English

nonimmutablesits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

nonimmutable is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Not immutable.".

nonimmutable doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. Our dataset records no confusable match here, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From non- + immutable. The correct English form is nonimmutable, spelled N-O-N-I-M-M-U-T-A-B-L-E.

Definition

  1. 1
    Not immutable.

Etymology

From non- + immutable.

Synonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "nonimmutable"?
"nonimmutable" is spelled N-O-N-I-M-M-U-T-A-B-L-E.
What does "nonimmutable" mean?
As an adjective, "nonimmutable" means: Not immutable.
What is the origin of the word "nonimmutable"?
From non- + immutable. 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.

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

Source: FrequencyWords open word-frequency list