aciervsamerTell them apart

Quick tell: acier is a noun, amer is an adjective, so they fill different roles in a sentence.

Which to use

“acier” is a noun and “amer” is an adjective - they look or sound alike but fill different roles in a sentence.

#3,974
“acier” frequency rank
#10,629
“amer” frequency rank
14603
confusion score

Side-by-Side Comparison

Feature acier amer
Definition Alliage de fer et de carbone, dont la proportion de celui-ci ne dépasse pas 2 %, susceptible d’acquérir, par certains procédés, un grand degré de dureté. Qui a une saveur âpre et généralement désagréable, comme celle de la quinine ou du café.

Where the eye mixes acier and amer

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
acier
4 ch
amer

Visual trap between acier and amer

These two trip readers on the page rather than in the ear: acier is \a.sje\ while amer is \a.mɛʁ\. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 14603, derived from the frequency rank of both members and their visual similarity.

acier is recorded at frequency rank #3,974, classified as anoun, pronounced \a.sje\. amer is at rank #10,629, tagged as anadj, pronounced \a.mɛʁ\.

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 14603, this pair ranks #395,957 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of acier vs amer

Shared letters: aer. Private to "acier": ci. Private to "amer": m.

"acier" · 5 letters · shape VCVVC  ·  "amer" · 4 letters · shape VCVC

Known mistypes of this pair

  • acieraccier · aceir · acierr · acire · aicer · caier
  • ameraemr · amerr · ammer · amre · maer

Frequently Asked Questions

Is swapping "acier" for "amer" ever safe?
No - they are not even the same part of speech. "acier" is a noun and "amer" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "acier" or "amer"?
"acier" is the more common of the two: it sits at frequency rank #3,974 in our French list, against #10,629 for "amer". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "acier" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "amer" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #395,957 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "acier" and "amer" also get mixed up with nearby pairs, the highest-scored neighbour is "amer vs avéra". 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 #395,957 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