Which to use
“fl” is an abbrev and “flex” is a verb - they look or sound alike but fill different roles in a sentence.
- #13,360
- “fl” frequency rank
- #19,574
- “flex” frequency rank
- 32934
- confusion score
Side-by-Side Comparison
| Feature | fl | flex |
|---|---|---|
| Definition | Femtoliter (= 10⁻¹⁵ l, ein billiardstel Liter) | 2. Person Singular Imperativ Präsens Aktiv des Verbs flexen |
Letter map: fl vs flex
Shared letters muted; letters that set fl and flex apart highlighted. Shared run: 2.
Role in the sentence - fl and flex
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fl is anabbrev and flexaverb. On the page they differ by 2 extra letter(s) - “fl” sits inside “flex”. Our composite confusion score for this pair is 32934, derived from the frequency rank of both members and their visual similarity.
fl is recorded at frequency rank #13,360, classified as anabbrev. flex is at rank #19,574, tagged as averb, pronounced [flɛks].
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 32934, this pair ranks #1,696,942 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fl vs flex
Shared letters: fl. Private to "fl": -. Private to "flex": ex.
"fl" · 2 letters · shape CC · "flex" · 4 letters · shape CCVC
Known mistypes of this pair
- flex ← felx · fflex · flexx · fllex · flxe · lfex
Frequently Asked Questions
Is swapping "fl" for "flex" ever safe?
In ordinary German text, does "fl" or "flex" show up more?
After this comparison
Pair "fl" vs "flex" is on the table, pick a follow-up below.
- Full dictionary entry for "fl" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "flex" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,696,942 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "fl" and "flex" also get mixed up with nearby pairs, the highest-scored neighbour is "Filet vs flex". 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 #1,696,942 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.