tailvsthinWhich spelling fits?

Quick tell: tail is a noun, thin is an adjective, so they fill different roles in a sentence.

Which to use

“tail” is a noun and “thin” is an adjective - they look or sound alike but fill different roles in a sentence.

#34,941
“tail” frequency rank
#34,948
“thin” frequency rank
69889
confusion score

Side-by-Side Comparison

Feature tail thin
Definition rabo, cauda delgado

Where the eye mixes tail and thin

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. tail (CVVC) and thin (CCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

4 ch
tail
4 ch
thin

Look-alike desk: tail vs thin

These two trip readers on the page rather than in the ear: tail is /teɪl/ while thin is /'θɪn/. 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 69889, derived from the frequency rank of both members and their visual similarity.

tail is recorded at frequency rank #34,941, classified as anoun, pronounced /teɪl/. thin is at rank #34,948, tagged as anadj, pronounced /'θɪn/.

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 69889, this pair ranks #3,811 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of tail vs thin

Shared letters: it. Private to "tail": al. Private to "thin": hn.

"tail" · 4 letters · shape CVVC  ·  "thin" · 4 letters · shape CCVC

Known mistypes of this pair

  • tail ← atil · taill · tali · tial · ttail
  • thin ← htin · thhin · thinn · thni · tihn · tthin

Frequently Asked Questions

Do "tail" and "thin" mean the same thing in a sentence?
No - they are not even the same part of speech. "tail" is a noun and "thin" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "tail" or "thin" show up more?
"tail" is the more common of the two: it sits at frequency rank #34,941 in our Portuguese list, against #34,948 for "thin". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "tail" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "thin" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #3,811 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "tail" and "thin" also get mixed up with nearby pairs, the highest-scored neighbour is "thin vs til". 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 #3,811 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list