additionary

/əˈdɪʃənəɹi/

//əˈdɪʃənəɹi// adj

"additionary" is a 11-letter English headword indexed on PlainSpell.

The verdict

“additionary” is outside the top-ranked English vocabulary, used as an adjective - the kind of word writers most often double-check.

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Synonym of additional.

Key facts for additionary
PropertyValue
Headwordadditionary
LanguageEnglish
Part of speechAdjective
IPA/əˈdɪʃənəɹi/
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “additionary” sits in English frequency

additionary falls outside the top-100,000 ranked English 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 English entry for additionary is 11 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /əˈdɪʃənəɹi/. 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: "Synonym of additional.".

No generated misspelling entries exist for additionary in our index, since its letter sequence doesn't invite the usual edit-distance slips. No close-neighbour confusable shows up for this headword in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From addition + -ary. The correct English form is additionary, spelled A-D-D-I-T-I-O-N-A-R-Y.

Definition

  1. 1
    Synonym of additional.

Etymology

From addition + -ary.

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 "additionary"?
"additionary" is spelled A-D-D-I-T-I-O-N-A-R-Y. The IPA pronunciation is /əˈdɪʃənəɹi/.
What does "additionary" mean?
As an adjective, "additionary" means: Synonym of additional.
How do you pronounce "additionary"?
The IPA (International Phonetic Alphabet) transcription for "additionary" is /əˈdɪʃənəɹi/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "additionary"?
From addition + -ary. See the full etymology section above for more details.
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 “additionary”

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

  • The one correct English spelling is A-D-D-I-T-I-O-N-A-R-Y - every other letter order is a misspelling in standard orthography.
  • Say it as /əˈdɪʃənəɹi/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English 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