Which to use
“apex” is a noun and “APO” is an abbrev - they look or sound alike but fill different roles in a sentence.
- #36,183
- “apex” frequency rank
- #31,930
- “APO” frequency rank
- 68113
- confusion score
Side-by-Side Comparison
| Feature | apex | APO |
|---|---|---|
| Definition | die Kegelspitze | außerparlamentarische Opposition |
Where the eye mixes apex and APO
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between apex and APO
These two trip readers on the page rather than in the ear: apex is [a.peks] while APO is [ˈaːpo]. 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 abbrev), which is usually the fastest check. Our composite confusion score for this pair is 68113, derived from the frequency rank of both members and their visual similarity.
apex is recorded at frequency rank #36,183, classified as anoun, pronounced [a.peks]. APO is at rank #31,930, tagged as anabbrev, pronounced [ˈaːpo].
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 68113, this pair ranks #518,292 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of apex vs APO
Shared letters: ap. Private to "apex": ex. Private to "APO": o.
"apex" · 4 letters · shape VCVC · "APO" · 3 letters · shape VCV
Known mistypes of this pair
- apex ← aepx · apexx · appex · apxe · paex
Frequently Asked Questions
Can "apex" and "APO" be used interchangeably?
Which is more common, "apex" or "APO"?
Useful next steps
Eye-level mix-up between "apex" and "APO" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "apex" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "APO" - compare definitions side by side with the headword page. Word entry
- This pair ranks #518,292 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "apex" and "APO" also get mixed up with nearby pairs, the highest-scored neighbour is "apel vs apex". 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 #518,292 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.