submitvssubunitWhich spelling fits?

Quick tell: submit is a verb, subunit is a noun, so they fill different roles in a sentence.

Which to use

“submit” is a verb and “subunit” is a noun - they look or sound alike but fill different roles in a sentence.

#4,494
“submit” frequency rank
#27,300
“subunit” frequency rank
31794
confusion score

Side-by-Side Comparison

Feature submit subunit
Definition To yield or give way to another. Any subdivision of a larger unit.

Where the eye mixes submit and subunit

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.

6 ch
submit
7 ch
subunit

Why the eye confuses submit with subunit

These two trip readers on the page rather than in the ear: submit is /səbˈmɪt/ while subunit is /sʌbˈjuːnɪt/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 31794, derived from the frequency rank of both members and their visual similarity.

submit is recorded at frequency rank #4,494, classified as averb, pronounced /səbˈmɪt/. subunit is at rank #27,300, tagged as anoun, pronounced /sʌbˈjuːnɪt/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 31794, this pair ranks #343,154 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of submit vs subunit

Shared letters: bistu. Private to "submit": m. Private to "subunit": n.

"submit" · 6 letters · shape CVCCVC  ·  "subunit" · 7 letters · shape CVCVCVC

Known mistypes of this pair

  • submitsbumit · ssubmit · subbmit · subimt · submitt · submmit · submti · sumbit
  • subunitsbuunit · ssubunit · subbunit · subnuit · subuint · subunitt · subunnit · subunti

Frequently Asked Questions

Is swapping "submit" for "subunit" ever safe?
No - they are not even the same part of speech. "submit" is a verb and "subunit" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "submit" or "subunit"?
"submit" is the more common of the two: it sits at frequency rank #4,494 in our English list, against #27,300 for "subunit". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "submit" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "subunit" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #343,154 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "submit" and "subunit" also get mixed up with nearby pairs, the highest-scored neighbour is "submit vs subset". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #343,154 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list