peptide

/ˈpɛptaɪd/

//ˈpɛptaɪd// noun

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

"peptide" is a 7-letter English headword indexed on PlainSpell.

The verdict

“peptide” has 10 generated spelling variants in the English index at frequency #19,659. The variants make it a useful spelling check.

#19,659
frequency rank, English
4,417
“P” headwords
10
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any of a class of organic compounds consisting of various numbers of amino acids in which the amine of one is reacted with the carboxylic acid of the next to form an amide bond.

Corpus desk

Index EN-peptide · peptide · English

peptide · rank #19,659 · 10 variants · 1 confusable

  • FREQ-MID #19,659
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 10 variants
  • BOOK-MID 4,417
  • PHOTO-FINISH pedophile

Nearest frequency peer: pedophile (-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 “peptide”

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

corpus weight

What this shows “peptide” 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).

peptide vs petite
71% similar

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

Key facts for peptide
PropertyValue
Headwordpeptide
LanguageEnglish
Part of speechNoun
IPA/ˈpɛptaɪd/
Letters7
Frequency rank#19,659
Misspellings tracked10
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “peptide”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).peptidelands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “pedophile” (#19,658), “peat” (#19,657), “periphery” (#19,661). Among 4,417 “P” headwords, “peptide” is #19,659. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around peptide (IPA /ˈpɛptaɪd/), anoun. Corpus frequency is #19,659 among 4,417 “P” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for peptide, with forms such as "epptide", "pepitde", and "pepptide". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "petite", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: From peptone, partially hydrolyzed protein, or German Peptid, from German Pepton, from Ancient Greek πεπτόν (peptón, “cooked, digested”) derived from πέπτω (péptō, “soften, ripen, boil, cook, bake, digest”). The correct English form is peptide, spelled P-E-P-T-I-D-E.

Definition

  1. 1
    Any of a class of organic compounds consisting of various numbers of amino acids in which the amine of one is reacted with the carboxylic acid of the next to form an amide bond.
  2. 2
    The peptide bond itself.
  3. 3
    performance-enhancing drugs, often a synthetic peptide compound

Recorded use

Wiktionary examples

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

  1. When it’s digested, its long amino-acid chains are first broken down into smaller fragments, or peptides. It turns out that many hormones and drugs are also peptides, and a number of casein peptides do affect the body in hormone-like ways.
  2. Please be patient with me, I get hundreds of emails a day in regards to anything fitness related including diet, recipes, eating schedules, work out routines, recommending what peptides to take for what and so on.

Etymology

From peptone, partially hydrolyzed protein, or German Peptid, from German Pepton, from Ancient Greek πεπτόν (peptón, “cooked, digested”) derived from πέπτω (péptō, “soften, ripen, boil, cook, bake, digest”).

Synonyms

peptide

This word in other languages

péptido(Español)peptide(Français)Peptid(Deutsch)

Common misspellings

Also misspelled as:

  • epptide
  • pepitde
  • pepptide
  • peptdie
  • peptidde
  • peptied
  • pepttide
  • petpide
  • ppeptide
  • ppetide

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of peptide - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

epptide2pepitde2pepptide1peptdie2peptidde1peptied2pepttide1petpide2
Edit distance from "peptide"

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 "peptide"?
"peptide" is spelled P-E-P-T-I-D-E. The IPA pronunciation is /ˈpɛptaɪd/.
What does "peptide" mean?
As a noun, "peptide" means: Any of a class of organic compounds consisting of various numbers of amino acids in which the amine of one is reacted with the carboxylic acid of the next to form an amide bond.
What words are commonly confused with "peptide"?
"peptide" is commonly confused with "petite". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "peptide"?
The IPA (International Phonetic Alphabet) transcription for "peptide" is /ˈpɛptaɪd/. 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 "peptide"?
From peptone, partially hydrolyzed protein, or German Peptid, from German Pepton, from Ancient Greek πεπτόν (peptón, “cooked, digested”) derived from πέπτω (péptō, “soften, ripen, boil, cook, bake, digest”). 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 "peptide", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

Peabody#19,656prelude#19,670prepaid#19,671McBride#19,643

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

omission10 variantsrounder10 variantssatanic10 variantsinferno10 variants

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

Source: FrequencyWords open word-frequency list