one-year-old
"one-year-old" is a 10-letter English headword indexed on PlainSpell.
The verdict
“one-year-old” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 12
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Having lived or existed for one year.
| Property | Value |
|---|---|
| Headword | one-year-old |
| Language | English |
| Part of speech | Adjective |
| Letters | 12 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “one-year-old” sits in English frequency
Rare enough to double-check
one-year-old is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Having lived or existed for one year.".
No misspelling variants are generated for one-year-old in our index, since its letter sequence doesn't invite the usual edit-distance slips. 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 one + year + old. The correct English form is one-year-old, spelled O-N-E---Y-E-A-R---O-L-D.
Definition
- 1Having lived or existed for one year.
Etymology
From one + year + old.
Synonyms
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
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Using “one-year-old”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-N-E---Y-E-A-R---O-L-D - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.