sicko

/ˈsɪkəʊ/

//ˈsɪkəʊ// noun

"sicko" is a 5-letter English headword indexed on PlainSpell.

The verdict

“sicko” is uncommon English (frequency #50,231 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.

#50,231
frequency rank, English
6,566
“S” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A person with unpleasant tastes, views or habits.

Corpus desk

Index EN-sicko · sicko · English

sicko · rank #50,231 · 0 variants · 0 confusables

  • FREQ-RARE #50,231
  • LEN-MID 5 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH shoebox

Nearest frequency peer: shoebox (-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 “sicko”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for sicko
PropertyValue
Headwordsicko
LanguageEnglish
Part of speechNoun
IPA/ˈsɪkəʊ/
Letters5
Frequency rank#50,231
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “sicko” 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).sickofalls 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: “shoebox” (#50,230), “sima” (#50,232), “shitter” (#50,229). Among 6,566 “S” headwords, “sicko” is #50,231. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

sicko is uncommon English at frequency #50,231 among 6,566 “S” headwords, classed as anoun, transcribed /ˈsɪkəʊ/. Rarity is why readers land here mid-draft. 3 senses are on record.

We couldn't generate a plausible misspelling set for sicko, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From sick + -o (“person with characteristic”). The correct English form is sicko, spelled S-I-C-K-O.

Definition

  1. 1
    A person with unpleasant tastes, views or habits.
  2. 2
    A mentally ill person.
  3. 3
    A physically ill person.

Recorded use

Wiktionary examples

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

  1. 1986 June 9, David Denby, Movies: Poison, New York, page 130, But in fact, the murders have been committed by an army of sickos, a phalanx of wild-eyed droolers led by a monster goon with a concrete jaw and a Neanderthal brow.
  2. 1997, Shannon Bell, Chapter 5: On ne peut pas voir l′image [The image cannot be seen], Brenda Cossman, Shannon Bell, Lise Gotell, Becki L. Ross, Bad Attitude/s on Trial: Pornography, Feminism, and the Butler Decision, page 231, We can′t say that it is our responses of horror and revulsion that are upsetting to the youth; therefore, those attracted to them…

Etymology

From sick + -o (“person with characteristic”).

Synonyms

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 "sicko"?
"sicko" is spelled S-I-C-K-O. The IPA pronunciation is /ˈsɪkəʊ/.
What does "sicko" mean?
As a noun, "sicko" means: A person with unpleasant tastes, views or habits.
How do you pronounce "sicko"?
The IPA (International Phonetic Alphabet) transcription for "sicko" is /ˈsɪkəʊ/. 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 "sicko"?
From sick + -o (“person with characteristic”). 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 "sicko", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 5 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list