flexvsFlugTell them apart

Quick tell: flex is a verb, Flug is a noun, so they fill different roles in a sentence.

Which to use

“flex” is a verb and “Flug” is a noun - they look or sound alike but fill different roles in a sentence.

#19,574
“flex” frequency rank
#2,649
“Flug” frequency rank
22223
confusion score

Side-by-Side Comparison

Feature flex Flug
Definition 2. Person Singular Imperativ Präsens Aktiv des Verbs flexen Fortbewegung eines Körpers durch die Luft, hauptsächlich durch Ausnutzung der Gesetze der Aerodynamik

Where the eye mixes flex and Flug

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
flex
4 ch
Flug

Look-alike desk: flex vs Flug

These two trip readers on the page rather than in the ear: flex is [flɛks] while Flug is [fluːk]. 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 22223, derived from the frequency rank of both members and their visual similarity.

flex is recorded at frequency rank #19,574, classified as averb, pronounced [flɛks]. Flug is at rank #2,649, tagged as anoun, pronounced [fluːk].

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 22223, this pair ranks #1,876,813 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of flex vs Flug

Shared letters: fl. Private to "flex": ex. Private to "Flug": gu.

"flex" · 4 letters · shape CCVC  ·  "Flug" · 4 letters · shape CCVC

Known mistypes of this pair

  • flexfelx · fflex · flexx · fllex · flxe · lfex
  • Flugfflug · flgu · fllug · flugg · fulg · lfug

Frequently Asked Questions

Do "flex" and "Flug" mean the same thing in a sentence?
No - they are not even the same part of speech. "flex" is a verb and "Flug" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "flex" or "Flug" show up more?
"Flug" is the more common of the two: it sits at frequency rank #2,649 in our German list, against #19,574 for "flex". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "flex" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Flug" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,876,813 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "flex" and "Flug" 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 #1,876,813 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list