Which to use
“flack” is a verb and “frank” is an adjective - they look or sound alike but fill different roles in a sentence.
- #30,799
- “flack” frequency rank
- #1,828
- “frank” frequency rank
- 32627
- confusion score
Side-by-Side Comparison
| Feature | flack | frank |
|---|---|---|
| Definition | To flutter; palpitate. | Honest, especially in a manner that seems slightly blunt; candid; not reserved or disguised. |
Where the eye mixes flack and frank
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between flack and frank
These two trip readers on the page rather than in the ear: flack is /flæk/ while frank is /ˈfɹæŋk/. 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 (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 32627, derived from the frequency rank of both members and their visual similarity.
flack is recorded at frequency rank #30,799, classified as averb, pronounced /flæk/. frank is at rank #1,828, tagged as anadj, pronounced /ˈfɹæŋk/.
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 32627, this pair ranks #336,257 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of flack vs frank
Shared letters: afk. Private to "flack": cl. Private to "frank": nr.
"flack" · 5 letters · shape CCVCC · "frank" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "flack" for "frank" ever safe?
In ordinary English text, does "flack" or "frank" show up more?
Useful next steps
Eye-level mix-up between "flack" and "frank" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "flack" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "frank" - compare definitions side by side with the headword page. Word entry
- This pair ranks #336,257 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "flack" and "frank" also get mixed up with nearby pairs, the highest-scored neighbour is "flack vs flail". 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 #336,257 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.