Which to use
“flask” and “flax” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,379
- “flask” frequency rank
- #27,151
- “flax” frequency rank
- 49530
- confusion score
Side-by-Side Comparison
| Feature | flask | flax |
|---|---|---|
| Definition | A narrow-necked vessel of metal or glass, used for various purposes; as of sheet metal, to carry gunpowder in; or of wrought iron, to contain quicksilver; or of glass, to heat water in, etc. | A plant of the genus Linum, especially Linum usitatissimum, which has a single, slender stalk, about a foot and a half high, with blue flowers. Also known as linseed, especially when referring to the seeds. |
Where the eye mixes flask and flax
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. flask runs 5 letters (CCVCC) against flax's 4 (CCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses flask with flax
A purely visual mix-up. flask (/ˈflɑːsk/) and flax (/flæks/) 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 1 letter(s) in length. Our composite confusion score for this pair is 49530, derived from the frequency rank of both members and their visual similarity.
flask is recorded at frequency rank #22,379, classified as anoun, pronounced /ˈflɑːsk/. flax is at rank #27,151, tagged as anoun, pronounced /flæks/.
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 49530, this pair ranks #182,708 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of flask vs flax
Shared letters: afl. Private to "flask": ks. Private to "flax": x.
"flask" · 5 letters · shape CCVCC · "flax" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Do "flask" and "flax" mean the same thing in a sentence?
In ordinary English text, does "flask" or "flax" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "flask" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "flax" - compare definitions side by side with the headword page. Word entry
- This pair ranks #182,708 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "flask" and "flax" also get mixed up with nearby pairs, the highest-scored neighbour is "flail vs flax". 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 #182,708 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.