equinox
/ˈɛkwɪnɒks/
"equinox" is a 7-letter English headword indexed on PlainSpell.
The verdict
“equinox” has 9 generated spelling variants in the English index at frequency #28,191. The variants make it a useful spelling check.
- #28,191
- frequency rank, English
- 18,836
- “E” headwords
- 9
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - One of two times in the year (one in March and the other in September) when the length of the day and the night are equal, which occurs when the sun is directly overhead at the equator; this marks ...
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | equinox |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈɛkwɪnɒks/ |
| Letters | 7 |
| Frequency rank | #28,191 |
| Misspellings tracked | 9 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “equinox” sits in English frequency
A misspelling magnet
The generator records 9 spelling variants around equinox (IPA /ˈɛkwɪnɒks/), anoun. Corpus frequency is #28,191 among 18,836 “E” headwords. Wiktionary lists 5 senses, so context still picks the gloss.
Our generated misspelling index lists 9 likely wrong-spelling variants for equinox, with forms such as "eqiunox", "eqquinox", and "equinnox". 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. It also participates in 1 confusable-pair relationship, "equine", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: PIE word *nókʷts From Middle English equinox, equinoxe, equynox (“one of the two periods in the year when the day and night are of equal length, equinox; either the zodiac sign Aries or Libra, in which the sun crosses the celestial equator”), from Old Fren… The correct English form is equinox, spelled E-Q-U-I-N-O-X.
Definition
- 1One of two times in the year (one in March and the other in September) when the length of the day and the night are equal, which occurs when the sun is directly overhead at the equator; this marks the beginning of spring in one hemisphere and autumn in the other.
- 2The circumstance of a twenty-four hour time period having the day and night of equal length.
- 3One of the two points in space where the apparent path of the Sun intersects with the equatorial plane of the Earth.
- 4A gale (“very strong wind”) once thought to occur more frequently around the time of an equinox (sense 1), now known to be a misconception; an equinoctial gale.
- 5A celestial equator (“great circle on the celestial sphere, coincident with the plane of the Earth's equator (the equatorial plane)”); also, the Earth's equator.
Etymology
PIE word *nókʷts From Middle English equinox, equinoxe, equynox (“one of the two periods in the year when the day and night are of equal length, equinox; either the zodiac sign Aries or Libra, in which the sun crosses the celestial equator”), from Old French equinoce, equinoxe (modern French équinoxe), or from its etymon Medieval Latin ēquinoxium, ēquinoctium, from Latin aequinoctium (“equinox”), from aequus (“equal”) + nox (“night”) (ultimately derived from Proto-Indo-European *nókʷts (“night”)) + -ium (suffix forming abstract nouns). The Latin word, ultimately adopted in Middle English and modern English, displaced Old English efnniht (modern English evennight). The rare alternative plural form equinoctes treats equinox as if it were a Latin word; the plural of Latin nox (“night”) is noctēs.
This word in other languages
Common misspellings
Also misspelled as:
- eqiunox
- eqquinox
- equinnox
- equinoxx
- equinxo
- equionx
- equniox
- euqinox
- qeuinox
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of equinox - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 "equinox"?
What does "equinox" mean?
What words are commonly confused with "equinox"?
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Is PlainSpell free to use?
Using “equinox”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is E-Q-U-I-N-O-X - every other letter order is a misspelling in standard orthography.
- Say it as /ˈɛkwɪnɒks/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “equine” - see the side-by-side comparison. equinox vs equine
- Browse more English words and confusable pairs in the same reference. English words
Same frequency band
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.