subsoil

/ˈsʌbsɔɪl/

//ˈsʌbsɔɪl// noun

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

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

The verdict

“subsoil” is uncommon English (frequency #71,946 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.

#71,946
frequency rank, English
6,566
“S” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The layer of earth that is below the topsoil.

Corpus desk

Index EN-subsoil · subsoil · English

subsoil · rank #71,946 · 0 variants · 0 confusables

  • FREQ-RARE #71,946
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH sublingual

Nearest frequency peer: sublingual (-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 “subsoil”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for subsoil
PropertyValue
Headwordsubsoil
LanguageEnglish
Part of speechNoun
IPA/ˈsʌbsɔɪl/
Letters7
Frequency rank#71,946
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “subsoil” 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).subsoilfalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “sublingual” (#71,945), “sunbathe” (#71,948), “STOL” (#71,941). Among 6,566 “S” headwords, “subsoil” is #71,946. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

subsoil is uncommon English at frequency #71,946 among 6,566 “S” headwords, classed as anoun, transcribed /ˈsʌbsɔɪl/. Rarity is why readers land here mid-draft. Gloss: "The layer of earth that is below the topsoil.".

Our edit-distance generator produced no likely misspellings for subsoil, typically a sign the spelling maps closely to how the word sounds. This headword has no recorded confusable partner, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From sub- + soil. The correct English form is subsoil, spelled S-U-B-S-O-I-L.

Definition

  1. 1
    The layer of earth that is below the topsoil.

Recorded use

Wiktionary example

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

  1. In the few areas underlain by horizontally bedded limestone, the surface soil is dark gray to black and peatlike, and the subsoil gray and marllike.

Etymology

From sub- + soil.

This word in other languages

subsuelo(Español)sous-sol(Français)Unterboden(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 "subsoil"?
"subsoil" is spelled S-U-B-S-O-I-L. The IPA pronunciation is /ˈsʌbsɔɪl/.
What does "subsoil" mean?
As a noun, "subsoil" means: The layer of earth that is below the topsoil.
How do you pronounce "subsoil"?
The IPA (International Phonetic Alphabet) transcription for "subsoil" is /ˈsʌbsɔɪl/. 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 "subsoil"?
From sub- + soil. 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 "subsoil", not the corpus desk frequency band.

Same letter count

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

speller#71,936speedos#71,934Sobotka#71,933throaty#71,974

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

Source: FrequencyWords open word-frequency list