ADR

/eɪ di ˈɑɹ/

//eɪ di ˈɑɹ// noun

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

"adr" is a 3-letter English headword indexed on PlainSpell.

The verdict

“ADR” sits in 20 confusable pairs (corpus #35,173) as a noun. The look-alike neighbours are the real trap.

#35,173
frequency rank, English
3,931
“A” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of adverse drug reaction.

Corpus desk

Index EN-adr · ADR · English

ADR · rank #35,173 · 0 variants · 20 confusables

  • FREQ-MID #35,173
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH abstracted

Nearest frequency peer: abstracted (-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.

Frequency neighbours of confusable “ADR”

Peers at similar corpus weight, separate from look-alike pairs below

corpus weight

What this shows Bars place “ADR” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

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

ADR vs as
0% similar
ADR vs at
0% similar
ADR vs an
0% similar

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

Key facts for ADR
PropertyValue
HeadwordADR
LanguageEnglish
Part of speechNoun
IPA/eɪ di ˈɑɹ/
Letters3
Frequency rank#35,173
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus rank beside confusables of “ADR”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “abstracted” (#35,172), “adversarial” (#35,174), “Abner” (#35,171). Among 3,931 “A” headwords, “ADR” is #35,173. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for ADR is neighbouring look-alikes ("as", "at", …), not just typos; it is anoun pronounced /eɪ di ˈɑɹ/. Frequency #35,173 among 3,931 “A” headwords. 8 recorded senses keep meaning in play.

The misspelling generator found no plausible variants for ADR, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "as", "at", "an", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

No explicit etymology string is stored for this entry, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is ADR, spelled A-D-R.

Definition

  1. 1
    Initialism of adverse drug reaction.
  2. 2
    Initialism of alternative dispute resolution.
  3. 3
    Initialism of American depositary receipt.
  4. 4
    Initialism of automatic dialogue replacement.
  5. 5
    Initialism of additional/audio dialogue replacement.
  6. 6
    Initialism of ain't doin' right (the situation where an animal appears unwell but has not yet been diagnosed with any specific illness).
  7. 7
    Initialism of architectural decision record.
  8. 8
    Initialism of air data reference.

Recorded use

Wiktionary example

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

  1. Anytime you notice your horse is ADR instead of BAR, it's time to get on the phone to your vet.

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 "ADR"?
"ADR" is spelled A-D-R. The IPA pronunciation is /eɪ di ˈɑɹ/.
What does "ADR" mean?
As a noun, "ADR" means: Initialism of adverse drug reaction.
What words are commonly confused with "ADR"?
"ADR" is commonly confused with "as", "at", "an". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "ADR"?
The IPA (International Phonetic Alphabet) transcription for "ADR" is /eɪ di ˈɑɹ/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "ADR" come from?
"ADR" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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 "ADR", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

VoD#35,153Viv#35,151vex#35,148tek#35,109

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

Source: FrequencyWords open word-frequency list