SemvsSTKWhich spelling fits?

Quick tell: Sem is a noun, STK is an abbrev, so they fill different roles in a sentence.

Which to use

“Sem” is a noun and “STK” is an abbrev - they look or sound alike but fill different roles in a sentence.

#29,785
“Sem” frequency rank
#42,155
“STK” frequency rank
71940
confusion score

Side-by-Side Comparison

Feature Sem STK
Definition kleinster, nicht weiter zerlegbarer Bestandteil der Bedeutung eines Wortes oder Morphems Stanice Technické Kontroly

Where the eye mixes Sem and STK

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. Sem (CVC) and STK (CCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
Sem
3 ch
STK

Why the eye confuses Sem with STK

These two trip readers on the page rather than in the ear: Sem is [zeːm] while STK is [ɛs.tɛː.kaː]. 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 (noun vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 71940, derived from the frequency rank of both members and their visual similarity.

Sem is recorded at frequency rank #29,785, classified as anoun, pronounced [zeːm]. STK is at rank #42,155, tagged as anabbrev, pronounced [ɛs.tɛː.kaː].

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 71940, this pair ranks #402,385 of 2,006,359 scored German confusable pairs - among the most confusable pairs.

Orthographic DNA of Sem vs STK

Shared letters: s. Private to "Sem": em. Private to "STK": kt.

"Sem" · 3 letters · shape CVC  ·  "STK" · 3 letters · shape CCC

Frequently Asked Questions

Is swapping "Sem" for "STK" ever safe?
No - they are not even the same part of speech. "Sem" is a noun and "STK" an abbrev, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "Sem" vs "STK" - which ranks higher?
"Sem" is the more common of the two: it sits at frequency rank #29,785 in our German list, against #42,155 for "STK". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "Sem" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "STK" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #402,385 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "Sem" and "STK" also get mixed up with nearby pairs, the highest-scored neighbour is "seg vs STK". Nearby pair

Confusion rank #402,385 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