IP

adj

"ip" is a 2-letter English headword indexed on PlainSpell.

The verdict

“IP” is a regularly-used English word, ranked #6,700 in English word frequency and used as an adjective.

#6,700
frequency rank, English
2
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of intraperitoneal.

Visual similarity to commonly confused words

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

IP vs is
0% similar
IP vs it
0% similar
IP vs IV
50% similar

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

Key facts for IP
PropertyValue
HeadwordIP
LanguageEnglish
Part of speechAdjective
Letters2
Frequency rank#6,700
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “IP” 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). IP lands here:

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

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

Spelling & Dictionary Insight

The English entry for IP is 2 letters long, classified as an adjective. Corpus data places it at rank #6,700 in overall English word frequency, indicating it appears regularly in written and spoken text. The dominant gloss from Wiktionary reads: "Initialism of intraperitoneal.".

We couldn't generate a plausible misspelling set for IP, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "is", "it", "IV", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Initialisms (see definitions). The correct English form is IP, spelled I-P.

Definition

  1. 1
    Initialism of intraperitoneal.

Etymology

Initialisms (see definitions).

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 "IP"?
"IP" is spelled I-P.
What does "IP" mean?
As an adjective, "IP" means: Initialism of intraperitoneal.
What words are commonly confused with "IP"?
"IP" is commonly confused with "is", "it", "IV". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "IP"?
Initialisms (see definitions). 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 “IP”

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

  • The one correct English spelling is I-P - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “is” - see the side-by-side comparison. IP vs is
  • Browse more English words and confusable pairs in the same reference. English words
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 FrequencyWords open word-frequency list