Ac

abbrev

By · According to Wiktionary data (CC BY-SA) ·

The verdict

“Ac” sits in 20 confusable pairs (corpus #6,033) as an abbreviation. The look-alike neighbours are the real trap.

#6,033
frequency rank, German
6,976
“A” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - chemisches Zeichen für Actinium

Corpus desk

Index DE-ac · Ac · German

Ac · rank #6,033 · 0 variants · 20 confusables

  • FREQ-COMMON #6,033
  • LEN-SHORT 2 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,976
  • PHOTO-FINISH öffentlicher

Nearest frequency peer: öffentlicher (-1 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Häufigkeitsnachbarn des Verwechslers „Ac“

Peers mit ähnlichem Corpus-Gewicht, getrennt von den Verwechslungspaaren unten

corpus weight

What this shows Balken platzieren „Ac“ gegen die nächsten gerankten deutschen Lemmata, kein Reprint der Verwechslungsdesk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

Ac vs an
0% similar
Ac vs am
0% similar
Ac vs AG
50% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for Ac
PropertyValue
HeadwordAc
LanguageGerman
Part of speechAbbreviation
Letters2
Frequency rank#6,033
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus-Rang neben Verwechslern von „Ac“

Diese Skala geht vom Kern des Alltagdeutschen (links) bis zum seltenen Langschwanz (rechts).Acliegt auf dieser Marke:

#1#100#1K#10K#100K
← used constantlyrarely used →

Die Skala ist logarithmisch (jeder Tick ≈ 10× seltener). Peers derselben Seltenheitsbandbreite: „öffentlicher“ (#6,032), „zielen“ (#6,031), „ziehe“ (#6,030). Unter 6,976 „A“-Lemmata liegt „Ac“ bei #6,033. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for Ac is neighbouring look-alikes ("an", "am", …), not just typos; it is anabbreviation. Frequency #6,033 among 6,976 “A” headwords. Gloss: "chemisches Zeichen für Actinium".

Ac doesn't appear in our generated misspelling index, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "an", "am", "AG", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

This entry carries no recorded etymology, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct German form is Ac, spelled A-C.

Definition

  1. 1
    chemisches Zeichen für Actinium

Recorded use

Wiktionary example

These source excerpts show how Ac appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. ²²⁷Ac besitzt eine Halbwertszeit von 21,8 Jahren.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 German corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "Ac"?
"Ac" is spelled A-C.
What does "Ac" mean?
As an abbreviation, "Ac" means: chemisches Zeichen für Actinium
What words are commonly confused with "Ac"?
"Ac" is commonly confused with "an", "am", "AG". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "Ac" come from?
"Ac" is a German word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

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

Source: FrequencyWords open word-frequency list