subunit

/sʌbˈjuːnɪt/

//sʌbˈjuːnɪt// noun

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

"subunit" is a 7-letter English headword indexed on PlainSpell.

The verdict

“subunit” has 10 generated spelling variants in the English index at frequency #27,300. The variants make it a useful spelling check.

#27,300
frequency rank, English
6,566
“S” headwords
10
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any subdivision of a larger unit.

Corpus desk

Index EN-subunit · subunit · English

subunit · rank #27,300 · 10 variants · 1 confusable

  • FREQ-MID #27,300
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 10 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH Stubbs

Nearest frequency peer: Stubbs (-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 “subunit”

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

corpus weight

What this shows “subunit” 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

Visual similarity to commonly confused words

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

subunit vs submit
71% similar

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

Key facts for subunit
PropertyValue
Headwordsubunit
LanguageEnglish
Part of speechNoun
IPA/sʌbˈjuːnɪt/
Letters7
Frequency rank#27,300
Misspellings tracked10
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “subunit”

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).subunitlands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “Stubbs” (#27,299), “suffix” (#27,302), “standstill” (#27,296). Among 6,566 “S” headwords, “subunit” is #27,300. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around subunit (IPA /sʌbˈjuːnɪt/), anoun. Corpus frequency is #27,300 among 6,566 “S” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for subunit, with forms such as "sbuunit", "ssubunit", and "subbunit". 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 1 confusable-pair relationship, "submit", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From sub- + unit. The correct English form is subunit, spelled S-U-B-U-N-I-T.

Definition

  1. 1
    Any subdivision of a larger unit.
  2. 2
    A protein subunit.

Recorded use

Wiktionary examples

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

  1. The bogies are built up of welded sub-units which are stress-relieved before assembly by riveting.
  2. Interchange manipulation comparisons showed that all subunits are still active, if at slightly lower rates.

Etymology

From sub- + unit.

Common misspellings

Also misspelled as:

  • sbuunit
  • ssubunit
  • subbunit
  • subnuit
  • subuint
  • subunitt
  • subunnit
  • subunti
  • suubnit
  • usbunit

Misspelling Pattern Breakdown

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

sbuunit2ssubunit1subbunit1subnuit2subuint2subunitt1subunnit1subunti2
Edit distance from "subunit"

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 "subunit"?
"subunit" is spelled S-U-B-U-N-I-T. The IPA pronunciation is /sʌbˈjuːnɪt/.
What does "subunit" mean?
As a noun, "subunit" means: Any subdivision of a larger unit.
What words are commonly confused with "subunit"?
"subunit" is commonly confused with "submit". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "subunit"?
The IPA (International Phonetic Alphabet) transcription for "subunit" is /sʌbˈjuːnɪt/. 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 "subunit"?
From sub- + unit. 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 "subunit", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

Sheehan#27,282twister#27,318quizzes#27,260queuing#27,259

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

shards10 variantsparagon10 variantsBarbour10 variantsBastille10 variants

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

Source: FrequencyWords open word-frequency list