lookup

noun

"lookup" is a 6-letter English headword indexed on PlainSpell.

The verdict

“lookup” has 8 generated spelling variants in the English index at frequency #34,576. The variants make it a useful spelling check.

#34,576
frequency rank, English
16,425
“L” headwords
8
tracked misspellings
6
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An attempt to retrieve data.

Visual similarity to commonly confused words

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

lookup vs loop
67% similar
lookup vs look
67% similar
lookup vs looks
67% similar

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

Key facts for lookup
PropertyValue
Headwordlookup
LanguageEnglish
Part of speechNoun
Letters6
Frequency rank#34,576
Misspellings tracked8
Confusable pairs6
SourceWiktionary (kaikki.org)

Where “lookup” sits in English frequency

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

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 8 spelling variants around lookup, anoun. Corpus frequency is #34,576 among 16,425 “L” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 8 likely wrong-spelling variants for lookup, with forms such as "llookup", "lokoup", and "lokup". 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 6 confusable-pair relationships, "loop", "look", "looks", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: Deverbal from look up. The correct English form is lookup, spelled L-O-O-K-U-P.

Definition

  1. 1
    An attempt to retrieve data.
  2. 2
    The process of locating a term in a reference work.

Etymology

Deverbal from look up.

Common misspellings

Also misspelled as:

  • llookup
  • lokoup
  • lokup
  • lookkup
  • lookpu
  • lookupp
  • looukp
  • olokup

Misspelling Pattern Breakdown

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

llookup1lokoup2lokup1lookkup1lookpu2lookupp1looukp2olokup2
Edit distance from "lookup"

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 "lookup"?
"lookup" is spelled L-O-O-K-U-P.
What does "lookup" mean?
As a noun, "lookup" means: An attempt to retrieve data.
What words are commonly confused with "lookup"?
"lookup" is commonly confused with "loop", "look", "looks". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "lookup"?
Deverbal from look up. 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.

Using “lookup”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is L-O-O-K-U-P - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “loop” - see the side-by-side comparison. lookup vs loop
  • Browse more English words and confusable pairs in the same reference. English words

Same frequency band

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.

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

Source: FrequencyWords open word-frequency list