feivsFonWhat's the difference?

Quick tell: fei is a particle, Fon is an abbrev, so they fill different roles in a sentence.

Which to use

“fei” is a particle and “Fon” is an abbrev - they look or sound alike but fill different roles in a sentence.

#21,248
“fei” frequency rank
#43,878
“Fon” frequency rank
65126
confusion score

Side-by-Side Comparison

Feature fei Fon
Definition erzgebirgisch, fränkisch, süddeutsch, oberdeutsch, drückt aus, dass man annimmt, dass die oder der Angesprochene das Gesagte noch nicht weiß Telefon

Where the spellings diverge

Shared letters are muted; the letters that actually set fei and Fon apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch
fei
3 ch
Fon

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: fei is [faɪ̯] while Fon is [foːn]. 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 (particle vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 65126, derived from the frequency rank of both members and their visual similarity.

fei is recorded at frequency rank #21,248, classified as aparticle, pronounced [faɪ̯]. Fon is at rank #43,878, tagged as anabbrev, pronounced [foːn].

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 65126, this pair ranks #617,656 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fei vs Fon

Shared letters: f. Private to "fei": ei. Private to "Fon": no.

"fei" · 3 letters · shape CVV  ·  "Fon" · 3 letters · shape CVC

Frequency comparison

fei#21,248
Fon#43,878

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "fei" and "Fon" be used interchangeably?
No - they are not even the same part of speech. "fei" is a particle and "Fon" an abbrev, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "fei" or "Fon"?
"fei" is the more common of the two: it sits at frequency rank #21,248 in our German list, against #43,878 for "Fon". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering fei vs Fon

The fastest way to pick the right one every time.

  • Check the role first: if you need a particle, it's “fei”; for an abbrev, it's “Fon”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “fei” entry
  • Browse more pairs most likely to be confused. Most confusable

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list