FortiervsfosterWhat's the difference?

Quick tell: Fortier is a name, foster is a verb, so they fill different roles in a sentence.

Which to use

“Fortier” is a name and “foster” is a verb - they look or sound alike but fill different roles in a sentence.

#40,277
“Fortier” frequency rank
#17,141
“foster” frequency rank
57418
confusion score

Side-by-Side Comparison

Feature Fortier foster
Definition Nom de famille. Alimenter, nourrir.

Where the eye mixes Fortier and foster

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.

7 ch
Fortier
6 ch
foster

Why the eye confuses Fortier with foster

These two trip readers on the page rather than in the ear: Fortier is \fɔʁ.tje\ while foster is \ˈfɒs.tə\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (name vs verb), which is usually the fastest check. Our composite confusion score for this pair is 57418, derived from the frequency rank of both members and their visual similarity.

Fortier is recorded at frequency rank #40,277, classified as aname, pronounced \fɔʁ.tje\. foster is at rank #17,141, tagged as averb, pronounced \ˈfɒs.tə\.

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 57418, this pair ranks #115,166 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Fortier vs foster

Shared letters: efort. Private to "Fortier": i. Private to "foster": s.

"Fortier" · 7 letters · shape CVCCVVC  ·  "foster" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • Fortierffortier · foriter · forrtier · forteir · fortierr · fortire · forttier · fotrier
  • fosterffoster · fosetr · fosster · fosterr · fostre · fostter · fotser · fsoter

Frequently Asked Questions

Can "Fortier" and "foster" be used interchangeably?
No - they are not even the same part of speech. "Fortier" is a name and "foster" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "Fortier" or "foster" show up more?
"foster" is the more common of the two: it sits at frequency rank #17,141 in our French list, against #40,277 for "Fortier". 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 "Fortier" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "foster" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #115,166 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "Fortier" and "foster" also get mixed up with nearby pairs, the highest-scored neighbour is "Fortier vs fortis". 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 #115,166 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list