Betamax
"betamax" is a 7-letter English headword indexed on PlainSpell.
The verdict
“Betamax” is uncommon English (frequency #80,243 among 31,241 “B” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #80,243
- frequency rank, English
- 31,241
- “B” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A home videocassette recording format developed by Sony in 1975, now known for having lost the format war to VHS.
| Property | Value |
|---|---|
| Headword | Betamax |
| Language | English |
| Part of speech | Proper noun |
| Letters | 7 |
| Frequency rank | #80,243 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “Betamax” sits in English frequency
Rare enough to double-check
Betamax is uncommon English at frequency #80,243 among 31,241 “B” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. Gloss: "A home videocassette recording format developed by Sony in 1975, now known for having lost the format war to VHS.".
Our edit-distance generator produced no likely misspellings for Betamax, which points to an orthography that plays by predictable English rules. No close-neighbour confusable shows up for this headword in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: According to Sony, the name had a double meaning: beta is the Japanese word used to describe the way in which signals are recorded on the tape; and the shape of the Greek letter beta β resembles the course of the tape through the transport. The suffix -max,… The correct English form is Betamax, spelled B-E-T-A-M-A-X.
Definition
- 1A home videocassette recording format developed by Sony in 1975, now known for having lost the format war to VHS.
Etymology
According to Sony, the name had a double meaning: beta is the Japanese word used to describe the way in which signals are recorded on the tape; and the shape of the Greek letter beta β resembles the course of the tape through the transport. The suffix -max, from maximum, was added to suggest greatness.
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 “Betamax”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is B-E-T-A-M-A-X - 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.