eau vs Ei, What's the Difference?

Which to use

“eau” and “Ei” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#29,094
“eau” frequency rank: #3,110
“Ei” frequency rank: 32204
confusion score

Side-by-Side Comparison

Feature	eau	Ei
Definition	Ansammlung von Wassermolekülen in flüssiger Form: Wasser	eine Keimzelle

Where the eye mixes eau and Ei

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

3 ch

eau

2 ch

Look-alike desk: eau vs Ei

A purely visual mix-up. eau ([o]) and Ei ([aɪ̯]) 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 32204, derived from the frequency rank of both members and their visual similarity.

eau is recorded at frequency rank #29,094, classified as anoun, pronounced [o]. Ei is at rank #3,110, tagged as anoun, pronounced [aɪ̯].

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 32204, this pair ranks #1,712,536 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of eau vs Ei

Shared letters: e. Private to "eau": au. Private to "Ei": i.

"eau" · 3 letters · shape VVV · "Ei" · 2 letters · shape VV

Frequently Asked Questions

Can "eau" and "Ei" be used interchangeably?

No. They are said differently ([o] versus [aɪ̯]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary German text, does "eau" or "Ei" show up more?

"Ei" is the more common of the two: it sits at frequency rank #3,110 in our German list, against #29,094 for "eau". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

Full dictionary entry for "eau" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Ei" - compare definitions side by side with the headword page. Word entry
This pair ranks #1,712,536 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
"eau" and "Ei" also get mixed up with nearby pairs, the highest-scored neighbour is "eau vs eo". Nearby pair

Confusion rank #1,712,536 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.