subdomain
"subdomain" is a 9-letter English headword indexed on PlainSpell.
The verdict
“subdomain” is uncommon English (frequency #86,804 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.
- #86,804
- frequency rank, English
- 6,566
- “S” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A domain or sphere that is part of a larger domain or sphere.
Corpus desk
Index EN-subdomain · subdomain · English
subdomain · rank #86,804 · 0 variants · 0 confusables
- FREQ-RARE #86,804
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH Suda
Nearest frequency peer: Suda (+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 “subdomain”
Sparse band: bars invert rank so rarer forms read shorter
- stomper
stomper
13,202 corpus weight
- subacute
subacute
13,199 corpus weight
- subdomain
subdomain
13,197 corpus weight
- Suda
Suda
13,196 corpus weight
- Sule
Sule
13,195 corpus weight
- sunstone
sunstone
13,191 corpus weight
What this shows Long-tail view: where “subdomain” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | subdomain |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #86,804 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “subdomain” in English
Rare enough to double-check
subdomain is uncommon English at frequency #86,804 among 6,566 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.
Zero misspellings are on record for subdomain in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From sub- + domain. The correct English form is subdomain, spelled S-U-B-D-O-M-A-I-N.
Definition
- 1A domain or sphere that is part of a larger domain or sphere.
- 2A domain name that has been prefaced with additional parts separated with periods.
- 3An additional part prefaced to a domain name.
Recorded use
Wiktionary examplesThese source excerpts show how subdomain appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
As a technical subdomain of biology ecological investigations have evolved from what has been traditionally called natural history.
A domain is a subdomain of another domain if it is contained within that domain. This relationship can be tested by seeing if the subdomain's name ends with the containing domain's name. For example, A.B.C.D is a subdomain of B.C.D, C.D, D, and " ".
Etymology
From sub- + domain.
Synonyms
This word in other languages
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "subdomain", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).