undercover

/ˌʌndə(ɹ)ˈkʌvə(ɹ)/

//ˌʌndə(ɹ)ˈkʌvə(ɹ)// adj

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

"undercover" is a 10-letter English headword indexed on PlainSpell.

The verdict

“undercover” has 15 generated spelling variants in the English index at frequency #10,145. The variants make it a useful spelling check.

#10,145
frequency rank, English
1,433
“U” headwords
15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Performed or happening in secret.

Corpus desk

Index EN-undercover · undercover · English

undercover · rank #10,145 · 15 variants · 0 confusables

  • FREQ-MID #10,145
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 15 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH trader

Nearest frequency peer: trader (-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.

Rank peers near misspelling magnet “undercover”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “undercover” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for undercover
PropertyValue
Headwordundercover
LanguageEnglish
Part of speechAdjective
IPA/ˌʌndə(ɹ)ˈkʌvə(ɹ)/
Letters10
Frequency rank#10,145
Misspellings tracked15
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “undercover”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).undercoverlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “trader” (#10,144), “valentine” (#10,146), “theological” (#10,143). Among 1,433 “U” headwords, “undercover” is #10,145. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around undercover (IPA /ˌʌndə(ɹ)ˈkʌvə(ɹ)/), anadjective. Corpus frequency is #10,145 among 1,433 “U” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 15 likely wrong-spelling variants for undercover, with forms such as "nudercover", "udnercover", and "unddercover". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From under + cover. The correct English form is undercover, spelled U-N-D-E-R-C-O-V-E-R.

Definition

  1. 1
    Performed or happening in secret.
  2. 2
    Employed or engaged in spying or secret investigation.

Etymology

From under + cover.

Synonyms

clandestine

This word in other languages

encubierto(Español)clandestin(Français)heimlich(Deutsch)encoberto(Português)

Common misspellings

Also misspelled as:

  • nudercover
  • udnercover
  • unddercover
  • undecrover
  • underccover
  • undercoevr
  • undercoverr
  • undercovre
  • undercovver
  • undercvoer
  • underocver
  • underrcover
  • undrecover
  • unedrcover
  • unndercover

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of undercover - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

nudercover2udnercover2unddercover1undecrover2underccover1undercoevr2undercoverr1undercovre2
Edit distance from "undercover"

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 "undercover"?
"undercover" is spelled U-N-D-E-R-C-O-V-E-R. The IPA pronunciation is /ˌʌndə(ɹ)ˈkʌvə(ɹ)/.
What does "undercover" mean?
As an adjective, "undercover" means: Performed or happening in secret.
What are common misspellings of "undercover"?
Common misspellings include "nudercover", "udnercover", "unddercover", "undecrover", "underccover". The correct spelling is "undercover".
How do you pronounce "undercover"?
The IPA (International Phonetic Alphabet) transcription for "undercover" is /ˌʌndə(ɹ)ˈkʌvə(ɹ)/. 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 "undercover"?
From under + cover. 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 "undercover", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

vegetation#10,147accountant#10,158simplicity#10,131admissions#10,160

Similar misspelling depth

Headwords with a similar count of attested misspellings (15 here; floor ≥5).

Starbucks15 variantsslightest15 variantsproclaimed15 variantsideological15 variants

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

Source: FrequencyWords open word-frequency list