Which to use
“eau” is a noun and “em” is a preposition - they look or sound alike but fill different roles in a sentence.
- #24,842
- “eau” frequency rank
- #7,152
- “em” frequency rank
- 31994
- confusion score
Side-by-Side Comparison
| Feature | eau | em |
|---|---|---|
| Definition | Agua. | En. |
Where the eye mixes eau and em
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: eau vs em
These two trip readers on the page rather than in the ear: eau is [o] while em is [ĩ]. 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 (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 31994, derived from the frequency rank of both members and their visual similarity.
eau is recorded at frequency rank #24,842, classified as anoun, pronounced [o]. em is at rank #7,152, tagged as aprep, pronounced [ĩ].
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 31994, this pair ranks #204,280 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of eau vs em
Shared letters: e. Private to "eau": au. Private to "em": m.
"eau" · 3 letters · shape VVV · "em" · 2 letters · shape VC
Frequently Asked Questions
Is swapping "eau" for "em" ever safe?
Which is more common, "eau" or "em"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "eau" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "em" - compare definitions side by side with the headword page. Word entry
- This pair ranks #204,280 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "eau" and "em" also get mixed up with nearby pairs, the highest-scored neighbour is "eau vs EPL". Nearby pair
Confusion rank #204,280 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.