bug
/bʌɡ/
"bug" is a 3-letter English headword indexed on PlainSpell.
The verdict
“bug” sits in 20 confusable pairs (corpus #5,105) as a noun. The look-alike neighbours are the real trap.
- #5,105
- frequency rank, English
- 4,121
- “B” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An insect of the order Hemiptera (the “true bugs”).
Corpus desk
Index EN-bug · bug · English
bug · rank #5,105 · 0 variants · 20 confusables
- FREQ-COMMON #5,105
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 4,121
- PHOTO-FINISH bronze
Nearest frequency peer: bronze (-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.
Frequency neighbourhood for “bug”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- blowing
blowing
94,899 corpus weight
- bored
bored
94,898 corpus weight
- bronze
bronze
94,897 corpus weight
- bug
bug
94,896 corpus weight
- caring
caring
94,895 corpus weight
- catching
catching
94,894 corpus weight
What this shows Bars show where “bug” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | bug |
| Language | English |
| Part of speech | Noun |
| IPA | /bʌɡ/ |
| Letters | 3 |
| Frequency rank | #5,105 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “bug” sits in English frequency
Easy to mix with look-alikes
The spelling risk for bug is neighbouring look-alikes ("by", "BW", …), not just typos; it is anoun pronounced /bʌɡ/. Frequency #5,105 among 4,121 “B” headwords. 27 recorded senses keep meaning in play.
Zero misspellings are on record for bug in our index, a sign its spelling follows regular English conventions. It also participates in 20 confusable-pair relationships, "by", "BW", "BX", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: First attested in this form around 1620 (referring to a “bedbug”), from earlier bugge (“beetle”), from Middle English bugge (“scarecrow, hobgoblin”) which is traced alternatively to: * a Celtic root found in Scots bogill (“goblin, bugbear”) and obsolete Wel… The correct English form is bug, spelled B-U-G.
Definition
- 1An insect of the order Hemiptera (the “true bugs”).
- 2Any of various species of marine (saltwater or freshwater) crustaceans; e.g. a Moreton Bay bug, mudbug.
- 3Any insect, arachnid, or other terrestrial arthropod that is a pest.
- 4Any minibeast.
- 5Any minibeast.
- 6Any minibeast.
- 7A bedbug.
- 8A problem that needs fixing.
- 9A contagious illness, or a pathogen causing it.
- 10An enthusiasm for something; an obsession.
- 11A keen enthusiast or hobbyist.
- 12A concealed electronic eavesdropping or intercept device
- 13A small and usually invisible file (traditionally a single-pixel image) on a World Wide Web page, primarily used to track users.
- 14A lobster.
- 15A small, usually transparent or translucent image placed in a corner of a television program to identify the broadcasting network or cable channel.
- 16A manually positioned marker in flight instruments.
- 17A semi-automated telegraph key.
- 18Hobgoblin, scarecrow; anything that terrifies.
- 19HIV.
- 20A limited form of wild card in some variants of poker.
- 21A trilobite.
- 22Synonym of oil bug.
- 23An asterisk denoting an apprentice jockey's weight allowance.
- 24A young apprentice jockey.
- 25Synonym of union bug.
- 26A small piece of metal used in a slot machine to block certain winning combinations.
- 27A metal clip attached to the underside of a table, etc. to hold hidden cards, as a form of cheating.
Recorded use
Wiktionary examplesThese source excerpts show how bug appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Bugs, oysters, prawns and crabs […] are plated up on the decks of four side-by-side trawlers bobbing on the calm waters of Trinity Inlet.
These flies are a bother. I’ll get some bug spray and kill them.
Etymology
First attested in this form around 1620 (referring to a “bedbug”), from earlier bugge (“beetle”), from Middle English bugge (“scarecrow, hobgoblin”) which is traced alternatively to: * a Celtic root found in Scots bogill (“goblin, bugbear”) and obsolete Welsh bwg (“ghost, hobgoblin”); compare Welsh bwgwl (“threat, fear”) and Middle Irish bocanách (“supernatural being”). * Proto-Germanic *bugja- (“swollen up, thick”), from Proto-Indo-European *bʰew-, *bu- (“to swell”); compare Norwegian bugge (“big man”), dialectal Low German Bögge (“goblin, snot”). * or to a word related to buck and originally referring to a goat-shaped spectre. For the “insect” meaning the assonance with Middle English budde (“beetle”), from Old English budda, from Proto-Germanic *buddô, *buzdô, from the same ultimate source as above, might have played a role. Compare Low German Budde (“louse, grub”), Norwegian budda (“newborn domestic animal”). More at bud. But ultimately this convergence of meaning doesn't prove a conflation of the two terms; they might have existed in parallel since PIE times with similar meanings, even if unnoticed by literary sources. The term is used to refer to technical errors and problems at least as early as the 19th century, predating the commonly known story of a moth being caught in a computer.
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.
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "bug", not the corpus desk frequency band.
What to do next
You've looked up "bug". Here's where to go from here.
- "bug" maps to 20 confusable pairs in this vintage; the highest-scored is "by". View pair
- Usage frequency rank #5,105 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "B" letter cohort. B–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
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.