bosom friend
Closest trusted companion
A bosom friend is an intimate, cherished companion—someone held close to the heart.
The phrase evokes the closeness of an embrace, suggesting deep trust and affection: Anne called Diana her bosom friend.
The expression sounds old-fashioned or literary today, though it remains recognizable.
Trusted keeper of secrets
- soulmateDeeply compatible life partner
- kindredRelations by blood
- allySupportive partner
- comradeFellow member, shared cause
partner · sidekick · mate · buddy · pal · chum · crony · best friend
One who is treasured
- dearTreasured or costly
- treasuredRegarded with deep affection
- preciousHighly esteemed, greatly valued
- adoredIntensely cherished
valued · favored · close-knit · inseparable · bonded · heartfelt · endearment · affection
Confidence in another
- secretsConcealed information
- closenessState of proximity
- heart-to-heartSincere personal discussion
- confidingSharing secrets trustingly
empathy · understanding · affinity · rapport · kinship · familiarity · innermost · vulnerability
confidant
Trusted keeper of secrets
comrade · partner · sidekick · mate · buddy · pal · chum · crony · best friend · BFF
beloved
One who is treasured
adored · valued · favored · close-knit · inseparable · bonded · heartfelt · endearment · affection · fondness
trust
Confidence in another
- secretsConcealed information
- closenessState of proximity
- heart-to-heartSincere personal discussion
confiding · empathy · understanding · affinity · rapport · kinship · familiarity · innermost · vulnerability · openness
bosom friendstranger
Person not yet known
complete stranger · acquaintance · casual acquaintance · nodding acquaintance · fair-weather friend
bosom friendsworn enemy
Vowed lifelong adversary
mortal enemy · arch-nemesis · archenemy · worst enemy · bitter enemy