harmonium

/hɑːˈməʊ̯.niː.əm/

//hɑːˈməʊ̯.niː.əm// noun

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

"harmonium" is a 9-letter English headword indexed on PlainSpell.

The verdict

“harmonium” is uncommon English (frequency #75,946 among 2,646 “H” headwords), classed as a noun. The kind of spelling people second-guess.

#75,946
frequency rank, English
2,646
“H” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.

Corpus desk

Index EN-harmonium · harmonium · English

harmonium · rank #75,946 · 0 variants · 0 confusables

  • FREQ-RARE #75,946
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,646
  • PHOTO-FINISH Harlingen

Nearest frequency peer: Harlingen (-1 rank slots)

Read with this headword: Spelling guide for this pattern

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.

Long-tail ranks near “harmonium”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “harmonium” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for harmonium
PropertyValue
Headwordharmonium
LanguageEnglish
Part of speechNoun
IPA/hɑːˈməʊ̯.niː.əm/
Letters9
Frequency rank#75,946
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “harmonium” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).harmoniumfalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “Harlingen” (#75,945), “hawt” (#75,947), “harken” (#75,944). Among 2,646 “H” headwords, “harmonium” is #75,946. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

harmonium is uncommon English at frequency #75,946 among 2,646 “H” headwords, classed as anoun, transcribed /hɑːˈməʊ̯.niː.əm/. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for harmonium in our index, which points to an orthography that plays by predictable English rules. Our dataset records no confusable match here, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847. The correct English form is harmonium, spelled H-A-R-M-O-N-I-U-M.

Definition

  1. 1
    A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.
  2. 2
    Synonym of Hooke's atom.

Recorded use

Wiktionary examples

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

  1. Pianos, melodiums, harmoniums, eolinas, &c. too dear at any price.
  2. The only other man was a little grey-headed fellow with a pleasant face and quick, twinkling eyes, who sat at a harmonium in the corner.

Etymology

Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847.

This word in other languages

harmonium(Français)Harmonium(Deutsch)harmônio(Português)

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 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "harmonium"?
"harmonium" is spelled H-A-R-M-O-N-I-U-M. The IPA pronunciation is /hɑːˈməʊ̯.niː.əm/.
What does "harmonium" mean?
As a noun, "harmonium" means: A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.
How do you pronounce "harmonium"?
The IPA (International Phonetic Alphabet) transcription for "harmonium" is /hɑːˈməʊ̯.niː.əm/. 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 "harmonium"?
Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "harmonium", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

Harlingen#75,945hardstyle#75,942gangplank#75,903faceplate#75,865

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

Source: FrequencyWords open word-frequency list