ob vs ou, What's the Difference?

Which to use

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

#139
“ob” frequency rank: #16,509
“ou” frequency rank: 16648
confusion score

Side-by-Side Comparison

Feature	ob	ou
Definition	leitet indirekte Fragesätze sowie Ungewissheit, Zweifel oder dergleichen ausdrückende Nebensätze ein (in Form von Subjekt-, Objekt- und Attributsätzen)	oder

Where the eye mixes ob and ou

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

2 ch

Why the eye confuses ob with ou

A purely visual mix-up. ob ([ɔp]) and ou ([u]) 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 a single letter - b in “ob” becomes u in “ou”. Our composite confusion score for this pair is 16648, derived from the frequency rank of both members and their visual similarity.

ob is recorded at frequency rank #139, classified as aconj, pronounced [ɔp]. ou is at rank #16,509, tagged as aconj, pronounced [u].

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 16648, this pair ranks #1,934,110 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ob vs ou

Shared letters: o. Private to "ob": b. Private to "ou": u.

"ob" · 2 letters · shape VC · "ou" · 2 letters · shape VV

Frequently Asked Questions

Can "ob" and "ou" be used interchangeably?

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

Frequency check: "ob" vs "ou" - which ranks higher?

"ob" is the more common of the two: it sits at frequency rank #139 in our German list, against #16,509 for "ou". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

Full dictionary entry for "ob" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ou" - compare definitions side by side with the headword page. Word entry
This pair ranks #1,934,110 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
"ob" and "ou" also get mixed up with nearby pairs, the highest-scored neighbour is "OGH vs ou". Nearby pair

Confusion rank #1,934,110 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.