suisvssumWhich spelling fits?

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

Which to use

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

#42,166
“suis” frequency rank
#31,289
“sum” frequency rank
73455
confusion score

Side-by-Side Comparison

Feature suis sum
Definition Inessiv Plural des Substantivs suu „Mund“ 1. Person Singular Indikativ Präsens Aktiv des Verbs esse

Letter map: suis vs sum

Shared letters muted; letters that set suis and sum apart highlighted. Shared run: 2.

4 ch
suis
3 ch
sum

Role in the sentence - suis and sum

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: suis is anoun and sumaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 73455, derived from the frequency rank of both members and their visual similarity.

suis is recorded at frequency rank #42,166, classified as anoun, pronounced […]. sum is at rank #31,289, tagged as averb, pronounced […].

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 73455, this pair ranks #359,944 of 2,006,359 scored German confusable pairs - among the most confusable pairs.

Orthographic DNA of suis vs sum

Shared letters: su. Private to "suis": i. Private to "sum": m.

"suis" · 4 letters · shape CVVC  ·  "sum" · 3 letters · shape CVC

Known mistypes of this pair

  • suissius · ssuis · suiss · susi · usis

Frequently Asked Questions

Is swapping "suis" for "sum" ever safe?
No - they are not even the same part of speech. "suis" is a noun and "sum" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "suis" or "sum" show up more?
"sum" is the more common of the two: it sits at frequency rank #31,289 in our German list, against #42,166 for "suis". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "suis" and "sum". Here's where to go from here.

  • Full dictionary entry for "suis" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sum" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #359,944 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "suis" and "sum" also get mixed up with nearby pairs, the highest-scored neighbour is "puzzles vs suis". 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 #359,944 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