FDAvsfisTell them apart

Quick tell: FDA is a abbrev, fis is a verb, so they fill different roles in a sentence.

Which to use

“FDA” is an abbrev and “fis” is a verb - they look or sound alike but fill different roles in a sentence.

#40,527
“FDA” frequency rank
#26,408
“fis” frequency rank
66935
confusion score

Side-by-Side Comparison

Feature FDA fis
Definition Food and Drug Administration 1. Person Singulra Indikativ historisches Perfekt Aktiv des Verbs faire

Letter map: FDA vs fis

Shared letters muted; letters that set FDA and fis apart highlighted. Shared run: 1. FDA (CCV) and fis (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
FDA
3 ch
fis

Part-of-speech tell for FDA / fis

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: FDA is anabbrev and fisaverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 66935, derived from the frequency rank of both members and their visual similarity.

FDA is recorded at frequency rank #40,527, classified as anabbrev. fis is at rank #26,408, tagged as averb, pronounced [fi].

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 66935, this pair ranks #556,742 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of FDA vs fis

Shared letters: f. Private to "FDA": ad. Private to "fis": is.

"FDA" · 3 letters · shape CCV  ·  "fis" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "FDA" for "fis" ever safe?
No - they are not even the same part of speech. "FDA" is an abbrev and "fis" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "FDA" or "fis"?
"fis" is the more common of the two: it sits at frequency rank #26,408 in our German list, against #40,527 for "FDA". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "FDA" and "fis".

  • Full dictionary entry for "FDA" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fis" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #556,742 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "FDA" and "fis" also get mixed up with nearby pairs, the highest-scored neighbour is "fay vs FDA". Nearby pair

Confusion rank #556,742 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