mouvsmouseWhat's the difference?

Quick tell: mou is a particle, mouse is a noun, so they fill different roles in a sentence.

Which to use

“mou” is a particle and “mouse” is a noun - they look or sound alike but fill different roles in a sentence.

#25,145
“mou” frequency rank
#4,255
“mouse” frequency rank
29400
confusion score

Side-by-Side Comparison

Feature mou mouse
Definition Sentence-final particle, forms a tag question. A rodent, typically having a small body, dark fur, and a long tail.

Letter map: mou vs mouse

Shared letters muted; letters that set mou and mouse apart highlighted. Shared run: 3.

3 ch
mou
5 ch
mouse

Part-of-speech tell for mou / mouse

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: mou is aparticle and mouseanoun. On the page they differ by 2 extra letter(s) - “mou” sits inside “mouse”. Our composite confusion score for this pair is 29400, derived from the frequency rank of both members and their visual similarity.

mou is recorded at frequency rank #25,145, classified as aparticle. mouse is at rank #4,255, tagged as anoun, pronounced /maʊs/.

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 29400, this pair ranks #363,312 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of mou vs mouse

Shared letters: mou. Private to "mou": -. Private to "mouse": es.

"mou" · 3 letters · shape CVV  ·  "mouse" · 5 letters · shape CVVCV

Known mistypes of this pair

  • mousemmouse · mosue · moues · muose · omuse

Frequently Asked Questions

Do "mou" and "mouse" mean the same thing in a sentence?
No - they are not even the same part of speech. "mou" is a particle and "mouse" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "mou" or "mouse" show up more?
"mouse" is the more common of the two: it sits at frequency rank #4,255 in our English list, against #25,145 for "mou". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "mou" and "mouse". Here's where to go from here.

  • Full dictionary entry for "mou" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mouse" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #363,312 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "mou" and "mouse" also get mixed up with nearby pairs, the highest-scored neighbour is "Moog vs mou". 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 #363,312 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