sis vs SZ, What's the Difference?

Which to use

“sis” is a num and “SZ” is an abbrev - they look or sound alike but fill different roles in a sentence.

#37,202
“sis” frequency rank: #6,363
“SZ” frequency rank: 43565
confusion score

Side-by-Side Comparison

Feature	sis	SZ
Definition	sechs (6)	Sommerzeit

Where the eye mixes sis and SZ

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

3 ch

sis

2 ch

Why the eye confuses sis with SZ

These two trip readers on the page rather than in the ear: sis is [sis] while SZ is [ɛsˈt͡sɛt]. 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 (num vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 43565, derived from the frequency rank of both members and their visual similarity.

sis is recorded at frequency rank #37,202, classified as anum, pronounced [sis]. SZ is at rank #6,363, tagged as anabbrev, pronounced [ɛsˈt͡sɛt].

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 43565, this pair ranks #1,414,091 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sis vs SZ

Shared letters: s. Private to "sis": i. Private to "SZ": z.

"sis" · 3 letters · shape CVC · "SZ" · 2 letters · shape CC

Frequently Asked Questions

Is swapping "sis" for "SZ" ever safe?

No - they are not even the same part of speech. "sis" is a num and "SZ" an abbrev, so a sentence built for one is usually ungrammatical with the other.

In ordinary German text, does "sis" or "SZ" show up more?

"SZ" is the more common of the two: it sits at frequency rank #6,363 in our German list, against #37,202 for "sis". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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

Full dictionary entry for "sis" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "SZ" - compare definitions side by side with the headword page. Word entry
This pair ranks #1,414,091 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
"sis" and "SZ" also get mixed up with nearby pairs, the highest-scored neighbour is "seg vs sis". Nearby pair

Confusion rank #1,414,091 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.