bulb

/ˈbʌlb/

//ˈbʌlb// noun

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

"bulb" is a 4-letter English headword indexed on PlainSpell.

The verdict

“bulb” has 6 generated spelling variants in the English index at frequency #11,846. The variants make it a useful spelling check.

#11,846
frequency rank, English
4,121
“B” headwords
6
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.

Corpus desk

Index EN-bulb · bulb · English

bulb · rank #11,846 · 6 variants · 20 confusables

  • FREQ-MID #11,846
  • LEN-MID 4 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-MID 6 variants
  • BOOK-MID 4,121
  • PHOTO-FINISH brewery

Nearest frequency peer: brewery (-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.

Rank peers near misspelling magnet “bulb”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “bulb” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

bulb vs but
50% similar
bulb vs buy
50% similar
bulb vs bus
50% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for bulb
PropertyValue
Headwordbulb
LanguageEnglish
Part of speechNoun
IPA/ˈbʌlb/
Letters4
Frequency rank#11,846
Misspellings tracked6
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “bulb”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).bulblands here:

#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. Same rarity band neighbours include “brewery” (#11,845), “cardboard” (#11,847), “Bonnie” (#11,844). Among 4,121 “B” headwords, “bulb” is #11,846. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 6 spelling variants around bulb (IPA /ˈbʌlb/), anoun. Corpus frequency is #11,846 among 4,121 “B” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 6 likely wrong-spelling variants for bulb, with forms such as "bbulb", "blub", and "bubl". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 20 confusable-pair relationships, "but", "buy", "bus", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”). The correct English form is bulb, spelled B-U-L-B.

Definition

  1. 1
    The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.
  2. 2
    The medulla oblongata.
  3. 3
    Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end.
  4. 4
    Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end.
  5. 5
    A bulbous protuberance at the forefoot of certain vessels to reduce turbulence.
  6. 6
    An onion.

Recorded use

Wiktionary examples

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

  1. the plants which grow in the earth from seed or bulbs.
  2. Once it [a snowdrop variety] became established, some bulbs were lifted and passed on to be chipped (i.e. cut into small pieces and grown on).

Etymology

Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”).

This word in other languages

bulbo(Español)bulbe(Français)Zwiebel(Deutsch)bulbo(Português)

Common misspellings

Also misspelled as:

  • bbulb
  • blub
  • bubl
  • bulbb
  • bullb
  • ublb

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of bulb - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

bbulb1blub2bubl2bulbb1bullb1ublb2
Edit distance from "bulb"

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 "bulb"?
"bulb" is spelled B-U-L-B. The IPA pronunciation is /ˈbʌlb/.
What does "bulb" mean?
As a noun, "bulb" means: The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.
What words are commonly confused with "bulb"?
"bulb" is commonly confused with "but", "buy", "bus". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "bulb"?
The IPA (International Phonetic Alphabet) transcription for "bulb" is /ˈbʌlb/. 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 "bulb"?
Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”). 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 "bulb", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

chew#11,850Audi#11,838acne#11,830wong#11,822

Similar misspelling depth

Headwords with a similar count of attested misspellings (6 here; floor ≥5).

Bonnie6 variantsDebbie6 variantsyeast6 variantstoby6 variants

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

Source: FrequencyWords open word-frequency list