biannual
/bʌɪˈanjuːəl/
"biannual" is a 8-letter English headword indexed on PlainSpell.
The verdict
“biannual” is uncommon English (frequency #55,277 among 4,121 “B” headwords), classed as an adjective. The kind of spelling people second-guess.
- #55,277
- frequency rank, English
- 4,121
- “B” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Occurring twice a year; semiannual.
Corpus desk
Index EN-biannual · biannual · English
biannual · rank #55,277 · 0 variants · 0 confusables
- FREQ-RARE #55,277
- LEN-LONG 8 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,121
- PHOTO-FINISH bibliographic…
Nearest frequency peer: bibliographical (+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 “biannual”
Sparse band: bars invert rank so rarer forms read shorter
- Berea
Berea
44,728 corpus weight
- biannual
biannual
44,724 corpus weight
- bibliograph…
bibliographical
44,723 corpus weight
- bier
bier
44,722 corpus weight
- bih
bih
44,721 corpus weight
- biliary
biliary
44,720 corpus weight
What this shows Long-tail view: where “biannual” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | biannual |
| Language | English |
| Part of speech | Adjective |
| IPA | /bʌɪˈanjuːəl/ |
| Letters | 8 |
| Frequency rank | #55,277 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “biannual” in English
Rare enough to double-check
biannual is uncommon English at frequency #55,277 among 4,121 “B” headwords, classed as anadjective, transcribed /bʌɪˈanjuːəl/. Rarity is why readers land here mid-draft. 2 senses are on record.
Zero misspellings are on record for biannual 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, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From bi- + annual. The correct English form is biannual, spelled B-I-A-N-N-U-A-L.
Definition
- 1Occurring twice a year; semiannual.
- 2Occurring once every two years; biennial.
Recorded use
Wiktionary examplesThese source excerpts show how biannual appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The annual values were disaggregated into biannual values. Then the biannual values were disaggregated into quarterly values. Finally the quarterly values were disaggregated into the desired monthly values.
Collection of papers presented at the workshops during the 1988 biannual symposia in February (New Orleans) and May (Innsbruck).
Etymology
From bi- + annual.
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
How do you spell "biannual"?
What does "biannual" mean?
How do you pronounce "biannual"?
What is the origin of the word "biannual"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "biannual", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 8 letters (nearest by frequency rank).