trialvstrillWhich spelling fits?

Which to use

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

#1,441
“trial” frequency rank
#40,489
“trill” frequency rank
41930
confusion score

Side-by-Side Comparison

Feature trial trill
Definition An occasion on which a person or thing is tested to find out how well they perform or how suitable they are. 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 trial and trill

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

5 ch
trial
5 ch
trill

Visual trap between trial and trill

A purely visual mix-up. trial (/ˈtɹaɪəl/) 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 a single letter - a in “trial” becomes l in “trill”. Our composite confusion score for this pair is 41930, derived from the frequency rank of both members and their visual similarity.

trial is recorded at frequency rank #1,441, classified as anoun, pronounced /ˈtɹaɪəl/. 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 41930, this pair ranks #253,856 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of trial vs trill

Shared letters: ilrt. Private to "trial": a. Private to "trill": -.

"trial" · 5 letters · shape CCVVC  ·  "trill" · 5 letters · shape CCVCC

Known mistypes of this pair

  • trialrtial · tiral · triall · trila · trrial · ttrial
  • trillrtill · tirll · tril · trlil · trrill · ttrill

Frequently Asked Questions

Is swapping "trial" for "trill" ever safe?
No. They are said differently (/ˈtɹaɪəl/ versus /tɹɪl/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "trial" or "trill" show up more?
"trial" is the more common of the two: it sits at frequency rank #1,441 in our English list, against #40,489 for "trill". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "trial" 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 #253,856 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "trial" 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 #253,856 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