equilibrium
/ɛkwɪˈlɪbɹɪəm/
"equilibrium" is a 11-letter English headword indexed on PlainSpell.
The verdict
“equilibrium” is a moderately-common English word, ranked #12,967 in English word frequency and used as a noun.
- #12,967
- frequency rank, English
- 11
- letters
- 15
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The condition of a system in which competing influences are balanced, resulting in no net change.
| Property | Value |
|---|---|
| Headword | equilibrium |
| Language | English |
| Part of speech | Noun |
| IPA | /ɛkwɪˈlɪbɹɪəm/ |
| Letters | 11 |
| Frequency rank | #12,967 |
| Misspellings tracked | 15 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “equilibrium” sits in English frequency
Spelling & Dictionary Insight
The English entry for equilibrium is 11 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɛkwɪˈlɪbɹɪəm/. Corpus data places it at rank #12,967 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 15 likely wrong-spelling variants for equilibrium, with forms such as "eqiulibrium", "eqquilibrium", and "equiilbrium". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. No close-neighbour confusable shows up for this headword in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From Latin aequilībrium, from equal + lībra (“balance”). The correct English form is equilibrium, spelled E-Q-U-I-L-I-B-R-I-U-M.
Definition
- 1The condition of a system in which competing influences are balanced, resulting in no net change.
- 2Mental balance.
- 3The state of a reaction in which the rates of the forward and reverse reactions are the same.
- 4The state of a body at rest or in uniform motion in which the resultant of all forces on it is zero.
Etymology
From Latin aequilībrium, from equal + lībra (“balance”).
This word in other languages
Common misspellings
Also misspelled as: eqiulibrium,eqquilibrium,equiilbrium,equilbirium,equilibbrium,equilibirum,equilibrimu,equilibriumm,equilibrrium,equilibruim,equilirbium,equillibrium,equliibrium,euqilibrium,qeuilibrium
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of equilibrium - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 "equilibrium"?
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Using “equilibrium”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is E-Q-U-I-L-I-B-R-I-U-M - every other letter order is a misspelling in standard orthography.
- Say it as /ɛkwɪˈlɪbɹɪəm/ (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
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.