Which to use
“flack” is a verb and “frock” is a noun - they look or sound alike but fill different roles in a sentence.
- #30,799
- “flack” frequency rank
- #33,656
- “frock” frequency rank
- 64455
- confusion score
Side-by-Side Comparison
| Feature | flack | frock |
|---|---|---|
| Definition | To flutter; palpitate. | A dress, a piece of clothing, which consists of a skirt and a cover for the upper body. |
Where the eye mixes flack and frock
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. flack and frock follow the identical consonant-vowel pattern (CCVCC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between flack and frock
These two trip readers on the page rather than in the ear: flack is /flæk/ while frock is /fɹɒk/. 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 noun), which is usually the fastest check. Our composite confusion score for this pair is 64455, 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/. frock is at rank #33,656, tagged as anoun, pronounced /fɹɒk/.
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 64455, this pair ranks #77,618 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of flack vs frock
Shared letters: cfk. Private to "flack": al. Private to "frock": or.
"flack" · 5 letters · shape CCVCC · "frock" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "flack" for "frock" ever safe?
Frequency check: "flack" vs "frock" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "flack" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "frock" - compare definitions side by side with the headword page. Word entry
- This pair ranks #77,618 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "flack" and "frock" also get mixed up with nearby pairs, the highest-scored neighbour is "fleck vs frock". 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 #77,618 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.