AufspürenvsaufzuspürenWhat's the difference?

Quick tell: Aufspüren is a noun, aufzuspüren is a verb, so they fill different roles in a sentence.

Which to use

“Aufspüren” is a noun and “aufzuspüren” is a verb - they look or sound alike but fill different roles in a sentence.

#28,527
“Aufspüren” frequency rank
#30,454
“aufzuspüren” frequency rank
58981
confusion score

Side-by-Side Comparison

Feature Aufspüren aufzuspüren
Definition das Finden, nach einer gezielten Suche nach etwas oder jemandem erweiterter Infinitiv Aktiv des Verbs aufspüren

Where the eye mixes Aufspüren and aufzuspüren

Muted = shared; highlighted = the visual trap. They share 9 letters in sequence. Aufspüren runs 9 letters (VVCCCVCVC) against aufzuspüren's 11 (VVCCVCCVCVC) - the length gap alone is often enough to separate them once you know to check it.

9 ch
Aufspüren
11 ch
aufzuspüren

Why the eye confuses Aufspüren with aufzuspüren

These two trip readers on the page rather than in the ear: Aufspüren is [ˈaʊ̯fˌʃpyːʁən] while aufzuspüren is [ˈaʊ̯ft͡suˌʃpyːʁən]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 58981, derived from the frequency rank of both members and their visual similarity.

Aufspüren is recorded at frequency rank #28,527, classified as anoun, pronounced [ˈaʊ̯fˌʃpyːʁən]. aufzuspüren is at rank #30,454, tagged as averb, pronounced [ˈaʊ̯ft͡suˌʃpyːʁən].

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 58981, this pair ranks #841,810 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Aufspüren vs aufzuspüren

Shared letters: aefnprsuü. Private to "Aufspüren": -. Private to "aufzuspüren": z.

"Aufspüren" · 9 letters · shape VVCCCVCVC  ·  "aufzuspüren" · 11 letters · shape VVCCVCCVCVC

Frequently Asked Questions

Can "Aufspüren" and "aufzuspüren" be used interchangeably?
No - they are not even the same part of speech. "Aufspüren" is a noun and "aufzuspüren" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "Aufspüren" or "aufzuspüren" show up more?
"Aufspüren" is the more common of the two: it sits at frequency rank #28,527 in our German list, against #30,454 for "aufzuspüren". 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 "Aufspüren" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aufzuspüren" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #841,810 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics

Confusion rank #841,810 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list