rootkit

noun

"rootkit" is a 7-letter English headword indexed on PlainSpell.

The verdict

“rootkit” is uncommon English (frequency #92,009 among 3,094 “R” headwords), classed as a noun. The kind of spelling people second-guess.

#92,009
frequency rank, English
3,094
“R” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.

Corpus desk

Index EN-rootkit · rootkit · English

rootkit · rank #92,009 · 0 variants · 0 confusables

  • FREQ-RARE #92,009
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,094
  • PHOTO-FINISH rooty

Nearest frequency peer: rooty (+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 “rootkit”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “rootkit” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for rootkit
PropertyValue
Headwordrootkit
LanguageEnglish
Part of speechNoun
Letters7
Frequency rank#92,009
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “rootkit” in English

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

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “rooty” (#92,010), “rowen” (#92,011), “RSF” (#92,012). Among 3,094 “R” headwords, “rootkit” is #92,009. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

rootkit is uncommon English at frequency #92,009 among 3,094 “R” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.".

rootkit doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. No close-neighbour confusable shows up for this headword in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From root + kit. The correct English form is rootkit, spelled R-O-O-T-K-I-T.

Definition

  1. 1
    A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.

Etymology

From root + kit.

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 "rootkit"?
"rootkit" is spelled R-O-O-T-K-I-T.
What does "rootkit" mean?
As a noun, "rootkit" means: A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.
What is the origin of the word "rootkit"?
From root + kit. 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 "rootkit", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list