piusvsprimusWhich spelling fits?

Quick tell: pius is a adjective, primus is a num, so they fill different roles in a sentence.

Which to use

“pius” is an adjective and “primus” is a num - they look or sound alike but fill different roles in a sentence.

#19,671
“pius” frequency rank
#25,711
“primus” frequency rank
45382
confusion score

Side-by-Side Comparison

Feature pius primus
Definition seinen eigenen moralischen Verpflichtungen nachkommend; pflichtbewusst, gewissenhaft, pflichtgetreu erster

Letter map: pius vs primus

Shared letters muted; letters that set pius and primus apart highlighted. Shared run: 4.

4 ch
pius
6 ch
primus

Grammar separator: pius vs primus

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: pius is anadjective and primusanum. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 45382, derived from the frequency rank of both members and their visual similarity.

pius is recorded at frequency rank #19,671, classified as anadj. primus is at rank #25,711, tagged as anum, pronounced [ˈpriː.mus].

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 45382, this pair ranks #1,354,932 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of pius vs primus

Shared letters: ipsu. Private to "pius": -. Private to "primus": mr.

"pius" · 4 letters · shape CVVC  ·  "primus" · 6 letters · shape CCVCVC

Known mistypes of this pair

  • piusipus · pisu · piuss · ppius · puis
  • primuspirmus · pprimus · primmus · primsu · primuss · priums · prmius · prrimus

Frequently Asked Questions

Do "pius" and "primus" mean the same thing in a sentence?
No - they are not even the same part of speech. "pius" is an adjective and "primus" a num, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "pius" or "primus"?
"pius" is the more common of the two: it sits at frequency rank #19,671 in our German list, against #25,711 for "primus". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "pius" and "primus". Here's where to go from here.

  • Full dictionary entry for "pius" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "primus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,354,932 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "pius" and "primus" also get mixed up with nearby pairs, the highest-scored neighbour is "Primat vs primus". 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 #1,354,932 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