- Amigo
- bestie
- Buddy
- Chum
- Chum (coll)
- Close friend
- Companion
- Animal buddy
- Canoodle
- Caress
- Domestic animal
- Domesticated animal
- Family dog
- Favourite
- Correspondent with chum in prison?
- Letter buddy
- Letter writer
- Letter-writing friend
- Person one exchanges letters with
- Bosom buddy
- Close friend
- Close friend who shares secrets
- Don, in fact, becomes a trusted sounding board
- Alt. of Confidante