adder

/ˈædɚ/

//ˈædɚ// noun

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

"adder" is a 5-letter English headword indexed on PlainSpell.

The verdict

“adder” has 5 generated spelling variants in the English index at frequency #41,977. The variants make it a useful spelling check.

#41,977
frequency rank, English
3,931
“A” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any snake.

Corpus desk

Index EN-adder · adder · English

adder · rank #41,977 · 5 variants · 20 confusables

  • FREQ-MID #41,977
  • LEN-MID 5 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH adamantly

Nearest frequency peer: adamantly (-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.

Rank peers near misspelling magnet “adder”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “adder” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

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).

adder vs ADR
0% similar
adder vs adds
60% similar
adder vs aide
60% similar

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

Key facts for adder
PropertyValue
Headwordadder
LanguageEnglish
Part of speechNoun
IPA/ˈædɚ/
Letters5
Frequency rank#41,977
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “adder”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “adamantly” (#41,976), “administratively” (#41,978), “acetaminophen” (#41,975). Among 3,931 “A” headwords, “adder” is #41,977. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around adder (IPA /ˈædɚ/), anoun. Corpus frequency is #41,977 among 3,931 “A” headwords. Wiktionary lists 9 senses, so context still picks the gloss.

Our generated misspelling index lists 5 likely wrong-spelling variants for adder, with forms such as "adderr", "addre", and "adedr". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 20 confusable-pair relationships, "ADR", "adds", "aide", 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 nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *n̥h₁trih₂, from *(s)… The correct English form is adder, spelled A-D-D-E-R.

Definition

  1. 1
    Any snake.
  2. 2
    A name loosely applied to various snakes more or less resembling a viper.
  3. 3
    A name loosely applied to various snakes more or less resembling a viper.
  4. 4
    A name loosely applied to various snakes more or less resembling a viper.
  5. 5
    A name loosely applied to various snakes more or less resembling a viper.
  6. 6
    A name loosely applied to various snakes more or less resembling a viper.
  7. 7
    A name loosely applied to various snakes more or less resembling a viper.
  8. 8
    A name loosely applied to various snakes more or less resembling a viper.
  9. 9
    A sea stickleback or adder fish (Spinachia spinachia).

Recorded use

Wiktionary examples

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

  1. CALIBAN: His spirits hear me, / And yet I needs must curse. But they'll nor pinch / Fright me with urchin-shows, pitch me i'th' mire, / Nor lead me like a firebrand in the dark / Out of my way, unless he bid 'em; but / For every trifle are they set upon me, / Sometimes like apes that mow and chatter at me, / And after bite me; then like hedgehogs, which /…
  2. Entirely filled with the image of another, her heart, indeed, had the deaf ear of the adder, which heedeth not the voice of the charmer, charm he never so wisely.

Etymology

From Middle English nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *n̥h₁trih₂, from *(s)neh₁- (“to spin, twist”). See also West Frisian njirre, Dutch adder, German Natter, Otter; also Welsh neidr, Latin natrīx (“watersnake”), Dutch naaien.

This word in other languages

serpiente(Español)vipère(Français)Natter(Deutsch)serpente(Português)

Common misspellings

Also misspelled as:

  • adderr
  • addre
  • adedr
  • ader
  • dader

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of adder - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

adderr1addre2adedr2ader1dader2
Edit distance from "adder"

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 "adder"?
"adder" is spelled A-D-D-E-R. The IPA pronunciation is /ˈædɚ/.
What does "adder" mean?
As a noun, "adder" means: Any snake.
What words are commonly confused with "adder"?
"adder" is commonly confused with "ADR", "adds", "aide". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "adder"?
The IPA (International Phonetic Alphabet) transcription for "adder" is /ˈædɚ/. 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 "adder"?
From Middle English nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *n̥h₁trih₂,... 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "adder", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 5 letters (nearest by frequency rank).

algal#41,991Yonge#41,963allay#41,993Arran#42,004

Similar misspelling depth

Headwords with a similar count of attested misspellings (5 here; floor ≥5).

Ahab5 variantsSuga5 variantssola5 variantsrube5 variants

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

Source: FrequencyWords open word-frequency list