subroutine

noun

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

"subroutine" is a 10-letter English headword indexed on PlainSpell.

The verdict

“subroutine” is uncommon English (frequency #51,425 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.

#51,425
frequency rank, English
6,566
“S” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A section of code, called by the main body of a program, that implements a task.

Corpus desk

Index EN-subroutine · subroutine · English

subroutine · rank #51,425 · 0 variants · 0 confusables

  • FREQ-RARE #51,425
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH streptococcus

Nearest frequency peer: streptococcus (-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 “subroutine”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for subroutine
PropertyValue
Headwordsubroutine
LanguageEnglish
Part of speechNoun
Letters10
Frequency rank#51,425
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “subroutine” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).subroutinefalls 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: “streptococcus” (#51,424), “succubus” (#51,426), “Strahan” (#51,423). Among 6,566 “S” headwords, “subroutine” is #51,425. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

subroutine is uncommon English at frequency #51,425 among 6,566 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A section of code, called by the main body of a program, that implements a task.".

No misspelling variants are generated for subroutine in our index, a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From sub- + routine. The correct English form is subroutine, spelled S-U-B-R-O-U-T-I-N-E.

Definition

  1. 1
    A section of code, called by the main body of a program, that implements a task.

Recorded use

Wiktionary example

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

  1. Holonyms: routine, program, app, application

Etymology

From sub- + routine.

This word in other languages

subrutina(Español)fonction(Français)Funktion(Deutsch)

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 "subroutine"?
"subroutine" is spelled S-U-B-R-O-U-T-I-N-E.
What does "subroutine" mean?
As a noun, "subroutine" means: A section of code, called by the main body of a program, that implements a task.
What is the origin of the word "subroutine"?
From sub- + routine. 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 "subroutine", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

vestibular#51,487prosciutto#51,330polygamous#51,322Balenciaga#51,555

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

Source: FrequencyWords open word-frequency list