Which to use
“SDP” is an abbrev and “sis” is a num - they look or sound alike but fill different roles in a sentence.
- #44,214
- “SDP” frequency rank
- #37,202
- “sis” frequency rank
- 81416
- confusion score
Side-by-Side Comparison
| Feature | SDP | sis |
|---|---|---|
| Definition | Sozialdemokratische Partei in der DDR in den Jahren 1989/1990 | sechs (6) |
Where the eye mixes SDP and sis
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. SDP (CCC) and sis (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: SDP vs sis
These two trip readers on the page rather than in the ear: SDP is [ɛsdeːˈpeː] while sis is [sis]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (abbrev vs num), which is usually the fastest check. Our composite confusion score for this pair is 81416, derived from the frequency rank of both members and their visual similarity.
SDP is recorded at frequency rank #44,214, classified as anabbrev, pronounced [ɛsdeːˈpeː]. sis is at rank #37,202, tagged as anum, pronounced [sis].
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 81416, this pair ranks #176,261 of 2,006,359 scored German confusable pairs - among the most confusable pairs.
Orthographic DNA of SDP vs sis
Shared letters: s. Private to "SDP": dp. Private to "sis": i.
"SDP" · 3 letters · shape CCC · "sis" · 3 letters · shape CVC
Frequently Asked Questions
Is swapping "SDP" for "sis" ever safe?
Frequency check: "SDP" vs "sis" - which ranks higher?
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 "SDP" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sis" - compare definitions side by side with the headword page. Word entry
- This pair ranks #176,261 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "SDP" and "sis" also get mixed up with nearby pairs, the highest-scored neighbour is "SDP vs seg". Nearby pair
Confusion rank #176,261 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.