bosom friend

noun

"bosom-friend" is a 11-letter English headword indexed on PlainSpell.

The verdict

“bosom friend” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
12
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A very close friend.

Corpus desk

Index EN-bosom-friend · bosom friend · English

bosom friend · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "B" thin
  • PHOTO-UNK Peer pending

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.

Key facts for bosom friend
PropertyValue
Headwordbosom friend
LanguageEnglish
Part of speechNoun
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “bosom friend” in English

bosom friendsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

bosom friend is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A very close friend.".

We couldn't generate a plausible misspelling set for bosom friend, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: Compound of bosom + friend. Compare typologically Russian напе́рсник (napérsnik), akin to Proto-Slavic *pьrsь, Russian закады́чный друг (zakadýčnyj drug), akin to кады́к (kadýk)). The correct English form is bosom friend, spelled B-O-S-O-M- -F-R-I-E-N-D.

Definition

  1. 1
    A very close friend.

Recorded use

Wiktionary example

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

  1. I pour you the farewell wine as you set out from the capital— Soon I shall be left behind here by my bosom-friend. In your sail-boat of sweet cinnamon-wood You will float again toward your own thatch door

Etymology

Compound of bosom + friend. Compare typologically Russian напе́рсник (napérsnik), akin to Proto-Slavic *pьrsь, Russian закады́чный друг (zakadýčnyj drug), akin to кады́к (kadýk)).

Synonyms

This word in other languages

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

How do you spell "bosom friend"?
"bosom friend" is spelled B-O-S-O-M- -F-R-I-E-N-D.
What does "bosom friend" mean?
As a noun, "bosom friend" means: A very close friend.
What is the origin of the word "bosom friend"?
Compound of bosom + friend. Compare typologically Russian напе́рсник (napérsnik), akin to Proto-Slavic *pьrsь, Russian закады́чный друг (zakadýčnyj drug), akin to кады́к (kadýk)). See the full etymology section above for more details.
Is PlainSpell free to use?
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Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list