Which to use
“fetus” and “focus” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #12,977
- “fetus” frequency rank
- #1,077
- “focus” frequency rank
- 14054
- confusion score
Side-by-Side Comparison
| Feature | fetus | focus |
|---|---|---|
| Definition | An unborn or unhatched vertebrate showing signs of the mature animal. | A point at which reflected or refracted rays of light converge. |
Where the eye mixes fetus and focus
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between fetus and focus
A purely visual mix-up. fetus (/ˈfiːtəs/) and focus (/ˈfəʊ.kəs/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 14054, derived from the frequency rank of both members and their visual similarity.
fetus is recorded at frequency rank #12,977, classified as anoun, pronounced /ˈfiːtəs/. focus is at rank #1,077, tagged as anoun, pronounced /ˈfəʊ.kəs/.
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 14054, this pair ranks #472,313 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fetus vs focus
Shared letters: fsu. Private to "fetus": et. Private to "focus": co.
"fetus" · 5 letters · shape CVCVC · "focus" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fetus" for "focus" ever safe?
In ordinary English text, does "fetus" or "focus" show up more?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "fetus" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "focus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #472,313 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fetus" and "focus" also get mixed up with nearby pairs, the highest-scored neighbour is "Fells vs fetus". 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 #472,313 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.