M1vsmudWhich spelling fits?

Which to use

“M1” and “mud” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#20,489
“M1” frequency rank
#49,806
“mud” frequency rank
70295
confusion score

Side-by-Side Comparison

Feature M1 mud
Definition Messier 1, la nébuleuse du Crabe. Boue.

Where the eye mixes M1 and mud

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
M1
3 ch
mud

Look-alike desk: M1 vs mud

A purely visual mix-up. M1 (\ɛm‿œ̃\) and mud (\ˈmʌd\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 70295, derived from the frequency rank of both members and their visual similarity.

M1 is recorded at frequency rank #20,489, classified as anoun, pronounced \ɛm‿œ̃\. mud is at rank #49,806, tagged as anoun, pronounced \ˈmʌd\.

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 70295, this pair ranks #51,884 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of M1 vs mud

Shared letters: m. Private to "M1": -. Private to "mud": du.

"M1" · 1 letters · shape C  ·  "mud" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "M1" for "mud" ever safe?
No. They are said differently (\ɛm‿œ̃\ versus \ˈmʌd\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "M1" vs "mud" - which ranks higher?
"M1" is the more common of the two: it sits at frequency rank #20,489 in our French list, against #49,806 for "mud". 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 "M1" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mud" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #51,884 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "M1" and "mud" also get mixed up with nearby pairs, the highest-scored neighbour is "mud vs MWh". Nearby pair

Confusion rank #51,884 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list