substance active

noun

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

The verdict

“substance active” is outside the top-ranked French vocabulary, used as a noun - the kind of word writers most often double-check.

Unranked
below top-frequency French
16
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.

Key facts for substance active
PropertyValue
Headwordsubstance active
LanguageFrench
Part of speechNoun
Letters16
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “substance active” sits in French frequency

substance active falls outside the top-100,000 ranked French words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The French entry for substance active is 16 letters long, classified as a noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.".

We couldn't generate a plausible misspelling set for substance active, a sign its spelling follows regular French conventions. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

No explicit etymology string is stored for this entry, so its spelling is best read as a straightforward mapping from sound to letter. The correct French form is substance active, spelled S-U-B-S-T-A-N-C-E- -A-C-T-I-V-E.

Definition

  1. 1
    Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.

Synonyms

principe actif

Antonyms

excipient

This word in other languages

active ingredient(English)fármaco(Español)Wirkstoff(Deutsch)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "substance active"?
"substance active" is spelled S-U-B-S-T-A-N-C-E- -A-C-T-I-V-E.
What does "substance active" mean?
As a noun, "substance active" means: Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.
What language does "substance active" come from?
"substance active" is a French 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.

Using “substance active”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct French spelling is S-U-B-S-T-A-N-C-E- -A-C-T-I-V-E - every other letter order is a misspelling in standard orthography.
  • Browse more French words and confusable pairs in the same reference. French words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

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