Which to use
“sec” is an adjective and “ser” is a verb - they look or sound alike but fill different roles in a sentence.
- #17,813
- “sec” frequency rank
- #39
- “ser” frequency rank
- 17852
- confusion score
Side-by-Side Comparison
| Feature | sec | ser |
|---|---|---|
| Definition | Seco | Tener algo una determinada naturaleza, propiedad o cualidad estable. |
Where the eye mixes sec and ser
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between sec and ser
These two trip readers on the page rather than in the ear: sec is [sɛk] while ser is [ˈseɾ]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - c in “sec” becomes r in “ser”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 17852, derived from the frequency rank of both members and their visual similarity.
sec is recorded at frequency rank #17,813, classified as anadj, pronounced [sɛk]. ser is at rank #39, tagged as averb, pronounced [ˈseɾ].
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 17852, this pair ranks #270,421 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of sec vs ser
Shared letters: es. Private to "sec": c. Private to "ser": r.
"sec" · 3 letters · shape CVC · "ser" · 3 letters · shape CVC
Frequently Asked Questions
Can "sec" and "ser" be used interchangeably?
In ordinary Spanish text, does "sec" or "ser" show up more?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sec" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ser" - compare definitions side by side with the headword page. Word entry
- This pair ranks #270,421 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sec" and "ser" also get mixed up with nearby pairs, the highest-scored neighbour is "sec vs stem". Nearby pair
Confusion rank #270,421 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.