Which to use
“sepsis” is a noun and “septic” is an adjective - they look or sound alike but fill different roles in a sentence.
- #28,714
- “sepsis” frequency rank
- #22,214
- “septic” frequency rank
- 50928
- confusion score
Side-by-Side Comparison
| Feature | sepsis | septic |
|---|---|---|
| Definition | A serious medical condition in which the whole body is inflamed, causing injury to its own tissues and organs as a response to infection. | Of or pertaining to sepsis. |
Where the eye mixes sepsis and septic
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. sepsis and septic follow the identical consonant-vowel pattern (CVCCVC). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses sepsis with septic
These two trip readers on the page rather than in the ear: sepsis is /ˈsɛpsɪs/ while septic is /ˈsep.tɪ̝k/. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 50928, derived from the frequency rank of both members and their visual similarity.
sepsis is recorded at frequency rank #28,714, classified as anoun, pronounced /ˈsɛpsɪs/. septic is at rank #22,214, tagged as anadj, pronounced /ˈsep.tɪ̝k/.
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 50928, this pair ranks #169,929 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sepsis vs septic
Shared letters: eips. Private to "sepsis": -. Private to "septic": ct.
"sepsis" · 6 letters · shape CVCCVC · "septic" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "sepsis" for "septic" ever safe?
Frequency check: "sepsis" vs "septic" - which ranks higher?
After this comparison
Eye-level mix-up between "sepsis" and "septic" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "sepsis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "septic" - compare definitions side by side with the headword page. Word entry
- This pair ranks #169,929 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sepsis" and "septic" also get mixed up with nearby pairs, the highest-scored neighbour is "septic vs SETI". 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 #169,929 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.