only

/ˈəʊn.li/

//ˈəʊn.li// adj

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

"only" is a 4-letter English headword indexed on PlainSpell.

The verdict

“only” is in the everyday core of English, ranked #79 in English word frequency and used as an adjective.

#79
frequency rank, English
4
letters
6
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Alone in a category.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

only vs oy
50% similar
only vs owl
50% similar
only vs Ons
25% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for only
PropertyValue
Headwordonly
LanguageEnglish
Part of speechAdjective
IPA/ˈəʊn.li/
Letters4
Frequency rank#79
Misspellings tracked6
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “only” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). only lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for only is 4 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˈəʊn.li/. Corpus data places it at rank #79 in overall English word frequency, putting it firmly in the everyday core of the language. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 6 likely wrong-spelling variants for only, with forms such as "noly", "olny", and "onlly". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 20 confusable-pair relationships, "oy", "owl", "Ons", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English oonly, only, from Old English ānlīċ, ǣnlīċ (“only; singular; solitary”), from Proto-Germanic *ainalīkaz. Cognate with obsolete Dutch eenlijk, German ähnlich (“similar”), Old Norse álíkr, Swedish enlig (“unified”). By surface analysis, on… The correct English form is only, spelled O-N-L-Y.

Definition

  1. 1
    Alone in a category.
  2. 2
    Singularly superior; the best.
  3. 3
    Without sibling; without a sibling of the same gender.
  4. 4
    Mere.

Etymology

From Middle English oonly, only, from Old English ānlīċ, ǣnlīċ (“only; singular; solitary”), from Proto-Germanic *ainalīkaz. Cognate with obsolete Dutch eenlijk, German ähnlich (“similar”), Old Norse álíkr, Swedish enlig (“unified”). By surface analysis, on(e) + -ly. * Regarding the different phonological development of only and one, see the note in one.

Synonyms

solelonesolepeerlessunequalednonpareil

This word in other languages

único(Español)unique(Français)einzig(Deutsch)único(Português)

Common misspellings

Also misspelled as: noly,olny,onlly,onlyy,onnly,onyl

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of only - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

noly2olny2onlly1onlyy1onnly1onyl2
Edit distance from "only"

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 "only"?
"only" is spelled O-N-L-Y. The IPA pronunciation is /ˈəʊn.li/.
What does "only" mean?
As an adjective, "only" means: Alone in a category.
What words are commonly confused with "only"?
"only" is commonly confused with "oy", "owl", "Ons". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "only"?
The IPA (International Phonetic Alphabet) transcription for "only" is /ˈəʊn.li/. 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 "only"?
From Middle English oonly, only, from Old English ānlīċ, ǣnlīċ (“only; singular; solitary”), from Proto-Germanic *ainalīkaz. Cognate with obsolete Dutch eenlijk, German ähnlich (“similar”), Old Norse álíkr, Swedish enlig (“unified”). By surface an... 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.

Using “only”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is O-N-L-Y - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈəʊn.li/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “oy” - see the side-by-side comparison. only vs oy
  • 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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list