only child

noun

"only-child" is a 9-letter English headword indexed on PlainSpell.

The verdict

“only child” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
10
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A person who has no siblings; a person raised as the sole child in a household.

Corpus desk

Index EN-only-child · only child · English

only child · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "O" thin
  • PHOTO-UNK Peer pending

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.

Key facts for only child
PropertyValue
Headwordonly child
LanguageEnglish
Part of speechNoun
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “only child” in English

only childfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

only child is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A person who has no siblings; a person raised as the sole child in a household.".

Zero misspellings are on record for only child in our index, a sign its spelling follows regular English conventions. This entry stands alone in our confusable dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

This entry carries no recorded etymology, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is only child, spelled O-N-L-Y- -C-H-I-L-D.

Definition

  1. 1
    A person who has no siblings; a person raised as the sole child in a household.

Recorded use

Wiktionary examples

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

  1. An only child is often stereotyped as spoiled.
  2. Tali: It's my father. He's the senior member of the Admiralty Board. He's one of only five people who can overrule the decisions of the Conclave for the good of the Migrant Fleet. Tali: My father is responsible for the lives of seventeen million people -- our entire race is in his hands. And I'm his only child.

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). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "only child"?
"only child" is spelled O-N-L-Y- -C-H-I-L-D.
What does "only child" mean?
As a noun, "only child" means: A person who has no siblings; a person raised as the sole child in a household.
What language does "only child" come from?
"only child" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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.

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

Source: FrequencyWords open word-frequency list