seivsseineWhat's the difference?

Which to use

“sei” and “seine” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#34,681
“sei” frequency rank
#23,389
“seine” frequency rank
58070
confusion score

Side-by-Side Comparison

Feature sei seine
Definition A sei whale. A long net having floats attached at the top and sinkers (weights) at the bottom, used in shallow water for catching fish.

Where the eye mixes sei and seine

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

3 ch
sei
5 ch
seine

Visual trap between sei and seine

A purely visual mix-up. sei (/seɪ/) and seine (/seɪn/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “sei” sits inside “seine”. Our composite confusion score for this pair is 58070, derived from the frequency rank of both members and their visual similarity.

sei is recorded at frequency rank #34,681, classified as anoun, pronounced /seɪ/. seine is at rank #23,389, tagged as anoun, pronounced /seɪn/.

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 58070, this pair ranks #115,032 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of sei vs seine

Shared letters: eis. Private to "sei": -. Private to "seine": n.

"sei" · 3 letters · shape CVV  ·  "seine" · 5 letters · shape CVVCV

Known mistypes of this pair

  • seineesine · seien · seinne · senie · siene · sseine

Frequently Asked Questions

Do "sei" and "seine" mean the same thing in a sentence?
No. They are said differently (/seɪ/ versus /seɪn/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "sei" or "seine"?
"seine" is the more common of the two: it sits at frequency rank #23,389 in our English list, against #34,681 for "sei". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "sei" and "seine" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "sei" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "seine" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #115,032 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "sei" and "seine" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs Sif". 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 #115,032 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list