coil

/kɔɪl/

//kɔɪl// noun

By · According to Wiktionary data (CC BY-SA) ·

"coil" is a 4-letter English headword indexed on PlainSpell.

The verdict

“coil” sits in 20 confusable pairs (corpus #10,666) as a noun. The look-alike neighbours are the real trap.

#10,666
frequency rank, English
5,599
“C” headwords
4
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Something wound in the form of a helix or spiral.

Corpus desk

Index EN-coil · coil · English

coil · rank #10,666 · 4 variants · 20 confusables

  • FREQ-MID #10,666
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-LOW 4 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH clearer

Nearest frequency peer: clearer (-1 rank slots)

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.

Frequency neighbourhood for “coil”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “coil” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

coil vs cop
50% similar
coil vs con
50% similar
coil vs cow
50% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for coil
PropertyValue
Headwordcoil
LanguageEnglish
Part of speechNoun
IPA/kɔɪl/
Letters4
Frequency rank#10,666
Misspellings tracked4
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “coil” sits in English frequency

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).coillands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “clearer” (#10,665), “combines” (#10,667), “Clayton” (#10,664). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for coil is neighbouring look-alikes ("cop", "con", …), not just typos; it is anoun pronounced /kɔɪl/. Frequency #10,666 among 5,599 “C” headwords. 5 recorded senses keep meaning in play.

Our generated misspelling index lists 4 likely wrong-spelling variants for coil, with forms such as "ccoil", "ciol", and "coill". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 20 confusable-pair relationships, "cop", "con", "cow", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English coilen, from Old French coillir, cuillir (“to gather, pluck, pick, cull”) (modern French cueillir), from Latin colligō (“to gather together”), past participle collectus, from com- (“together”) + legō (“to gather”); compare legend. Double… The correct English form is coil, spelled C-O-I-L.

Definition

  1. 1
    Something wound in the form of a helix or spiral.
  2. 2
    Any intrauterine device (abbreviation: IUD)—the first IUDs were coil-shaped.
  3. 3
    A coil of electrically conductive wire through which electricity can flow.
  4. 4
    A cylinder of clay.
  5. 5
    Entanglement; perplexity.

Recorded use

Wiktionary examples

These source excerpts show how coil appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. the sinuous coils of a snake
  2. The wild grapevines that twisted their coils or tendrils from tree to tree.

Etymology

From Middle English coilen, from Old French coillir, cuillir (“to gather, pluck, pick, cull”) (modern French cueillir), from Latin colligō (“to gather together”), past participle collectus, from com- (“together”) + legō (“to gather”); compare legend. Doublet of cull.

This word in other languages

espiral(Español)spire(Français)Spirale(Deutsch)

Common misspellings

Also misspelled as:

  • ccoil
  • ciol
  • coill
  • ocil

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of coil - 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.

ccoil1ciol2coill1ocil2
Edit distance from "coil"

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 "coil"?
"coil" is spelled C-O-I-L. The IPA pronunciation is /kɔɪl/.
What does "coil" mean?
As a noun, "coil" means: Something wound in the form of a helix or spiral.
What words are commonly confused with "coil"?
"coil" is commonly confused with "cop", "con", "cow". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "coil"?
The IPA (International Phonetic Alphabet) transcription for "coil" is /kɔɪl/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "coil"?
From Middle English coilen, from Old French coillir, cuillir (“to gather, pluck, pick, cull”) (modern French cueillir), from Latin colligō (“to gather together”), past participle collectus, from com- (“together”) + legō (“to gather”); compare lege... 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "coil", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

Emmy#10,684flex#10,696vain#10,632Hank#10,709

What to do next

You've looked up "coil". Here's where to go from here.

  • "coil" maps to 20 confusable pairs in this vintage; the highest-scored is "cop". View pair
  • 4 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
  • Usage frequency rank #10,666 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "C" letter cohort. C–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

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.

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

Source: FrequencyWords open word-frequency list