trivstrillWhich spelling fits?

Which to use

“tri” and “trill” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#11,142
“tri” frequency rank
#40,489
“trill” frequency rank
51631
confusion score

Side-by-Side Comparison

Feature tri trill
Definition triathlon A rapid alternation between an indicated note and the one above it as an ornament; in musical notation usually indicated with the letters tr written above the staff.

Where the eye mixes tri and trill

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

3 ch
tri
5 ch
trill

Visual trap between tri and trill

A purely visual mix-up. tri (/tɹaɪ/) and trill (/tɹɪl/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “tri” sits inside “trill”. Our composite confusion score for this pair is 51631, derived from the frequency rank of both members and their visual similarity.

tri is recorded at frequency rank #11,142, classified as anoun, pronounced /tɹaɪ/. trill is at rank #40,489, tagged as anoun, pronounced /tɹɪl/.

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 51631, this pair ranks #163,865 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of tri vs trill

Shared letters: irt. Private to "tri": -. Private to "trill": l.

"tri" · 3 letters · shape CCV  ·  "trill" · 5 letters · shape CCVCC

Known mistypes of this pair

  • trillrtill · tirll · tril · trlil · trrill · ttrill

Frequently Asked Questions

Is swapping "tri" for "trill" ever safe?
No. They are said differently (/tɹaɪ/ versus /tɹɪl/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "tri" vs "trill" - which ranks higher?
"tri" is the more common of the two: it sits at frequency rank #11,142 in our English list, against #40,489 for "trill". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Eye-level mix-up between "tri" and "trill" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "tri" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "trill" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #163,865 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "tri" and "trill" also get mixed up with nearby pairs, the highest-scored neighbour is "trawl vs trill". 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 #163,865 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list