debovsDueroTell them apart

Quick tell: debo is a verb, Duero is a name, so they fill different roles in a sentence.

Which to use

“debo” is a verb and “Duero” is a name - they look or sound alike but fill different roles in a sentence.

#1,845
“debo” frequency rank
#19,706
“Duero” frequency rank
21551
confusion score

Side-by-Side Comparison

Feature debo Duero
Definition Primera persona del singular (yo) del presente de indicativo de deber. Río de la vertiente atlántica en España y Portugal. El río se llama Durius en latín y Δουριος en griego. Parece un topónimo claramente prerromano: la raíz dur- parece que tiene el sentido de curso de agua en distintos países de Europa occidental. Pueden estar emparentados Duruelo (Segovia), Duruelo de la Sierra (Soria), que parecen diminutivos de Duero.

Where the eye mixes debo and Duero

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

4 ch
debo
5 ch
Duero

Why the eye confuses debo with Duero

These two trip readers on the page rather than in the ear: debo is [ˈd̪eβ̞o] while Duero is [ˈd̪weɾo]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs name), which is usually the fastest check. Our composite confusion score for this pair is 21551, derived from the frequency rank of both members and their visual similarity.

debo is recorded at frequency rank #1,845, classified as averb, pronounced [ˈd̪eβ̞o]. Duero is at rank #19,706, tagged as aname, pronounced [ˈd̪weɾo].

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 21551, this pair ranks #254,416 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of debo vs Duero

Shared letters: deo. Private to "debo": b. Private to "Duero": ru.

"debo" · 4 letters · shape CVCV  ·  "Duero" · 5 letters · shape CVVCV

Known mistypes of this pair

  • debodbeo · ddebo · debbo · deob · devo · edbo
  • Duerodduero · deuro · dueor · duerro · dureo · udero

Frequently Asked Questions

Do "debo" and "Duero" mean the same thing in a sentence?
No - they are not even the same part of speech. "debo" is a verb and "Duero" a name, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "debo" or "Duero"?
"debo" is the more common of the two: it sits at frequency rank #1,845 in our Spanish list, against #19,706 for "Duero". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "debo" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Duero" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #254,416 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "debo" and "Duero" also get mixed up with nearby pairs, the highest-scored neighbour is "ducto vs Duero". 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 #254,416 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list