infrasound
"infrasound" is a 10-letter English headword indexed on PlainSpell.
The verdict
“infrasound” is uncommon English (frequency #96,083 among 17,902 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #96,083
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Sound waves having a frequency below the human audible range (below about 20 Hz).
| Property | Value |
|---|---|
| Headword | infrasound |
| Language | English |
| Part of speech | Noun |
| Letters | 10 |
| Frequency rank | #96,083 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “infrasound” sits in English frequency
Rare enough to double-check
infrasound is uncommon English at frequency #96,083 among 17,902 “I” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Sound waves having a frequency below the human audible range (below about 20 Hz).".
No generated misspelling entries exist for infrasound in our index, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From infra- + sound. The correct English form is infrasound, spelled I-N-F-R-A-S-O-U-N-D.
Definition
- 1Sound waves having a frequency below the human audible range (below about 20 Hz).
Etymology
From infra- + sound.
Antonyms
This word in other languages
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
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Using “infrasound”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-F-R-A-S-O-U-N-D - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
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.