underground

/ˌʌn.dəˈɡɹaʊnd/

//ˌʌn.dəˈɡɹaʊnd// adj

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

"underground" is a 11-letter English headword indexed on PlainSpell.

The verdict

“underground” has 17 generated spelling variants in the English index at frequency #4,200. The variants make it a useful spelling check.

#4,200
frequency rank, English
1,433
“U” headwords
17
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Below the ground; below the surface of the Earth.

Corpus desk

Index EN-underground · underground · English

underground · rank #4,200 · 17 variants · 0 confusables

  • FREQ-COMMON #4,200
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 17 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH Ukraine

Nearest frequency peer: Ukraine (-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 “underground”

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

corpus weight

What this shows “underground” 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 underground
PropertyValue
Headwordunderground
LanguageEnglish
Part of speechAdjective
IPA/ˌʌn.dəˈɡɹaʊnd/
Letters11
Frequency rank#4,200
Misspellings tracked17
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “underground”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).undergroundlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “Ukraine” (#4,199), “versus” (#4,201), “trials” (#4,198). Among 1,433 “U” headwords, “underground” is #4,200. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 17 spelling variants around underground (IPA /ˌʌn.dəˈɡɹaʊnd/), anadjective. Corpus frequency is #4,200 among 1,433 “U” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 17 likely wrong-spelling variants for underground, with forms such as "nuderground", "udnerground", and "undderground". 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 confusable-pair dataset has no match for it, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Middle English undergrounde (adverb), equivalent to under + ground or under- + ground. Compare Dutch ondergrond, ondergronds, German Untergrund, Danish undergrunds. The correct English form is underground, spelled U-N-D-E-R-G-R-O-U-N-D.

Definition

  1. 1
    Below the ground; below the surface of the Earth.
  2. 2
    Hidden, furtive, secretive.
  3. 3
    Of or relating to an art forms (such as music) or subculture that is outside the mainstream, especially one that is unofficial and hidden from the authorities.

Recorded use

Wiktionary examples

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

  1. There is an underground tunnel that takes you across the river.
  2. One of the hidden glories of Victorian engineering is proper drains. Isolating a city’s effluent and shipping it away in underground sewers has probably saved more lives than any medical procedure except vaccination.

Etymology

From Middle English undergrounde (adverb), equivalent to under + ground or under- + ground. Compare Dutch ondergrond, ondergronds, German Untergrund, Danish undergrunds.

This word in other languages

subterráneo(Español)souterrain(Français)unterirdisch(Deutsch)subterrâneo(Português)

Common misspellings

Also misspelled as:

  • nuderground
  • udnerground
  • undderground
  • undegrround
  • undergground
  • undergorund
  • undergronud
  • undergroudn
  • undergroundd
  • undergrounnd
  • undergrround
  • undergruond
  • underrgound
  • underrground
  • undreground
  • unedrground
  • unnderground

Misspelling Pattern Breakdown

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

nuderground2udnerground2undderground1undegrround2undergground1undergorund2undergronud2undergroudn2
Edit distance from "underground"

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 "underground"?
"underground" is spelled U-N-D-E-R-G-R-O-U-N-D. The IPA pronunciation is /ˌʌn.dəˈɡɹaʊnd/.
What does "underground" mean?
As an adjective, "underground" means: Below the ground; below the surface of the Earth.
What are common misspellings of "underground"?
Common misspellings include "nuderground", "udnerground", "undderground", "undegrround", "undergground". The correct spelling is "underground".
How do you pronounce "underground"?
The IPA (International Phonetic Alphabet) transcription for "underground" is /ˌʌn.dəˈɡɹaʊnd/. 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 "underground"?
From Middle English undergrounde (adverb), equivalent to under + ground or under- + ground. Compare Dutch ondergrond, ondergronds, German Untergrund, Danish undergrunds. 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 "underground", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

preparation#4,181distributed#4,227documentary#4,229legislative#4,170

Similar misspelling depth

Headwords with a similar count of attested misspellings (17 here; floor ≥5).

Massachusetts17 variantspsychology17 variantssubstantial17 variantsinvolvement17 variants

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

Source: FrequencyWords open word-frequency list