| brotherly(adjective, friendly, fraternal) |
| buddy buddy(expression, adjective, close, friendly, familiar) |
| cliquey |
| closed |
| communicative |
| companionate |
| complacent(adjective, close, friendly, familiar, cordial) |
| comradely(adjective, good, friendly, loving, cordial) |
| conciliatory(adjective, good, friendly, loving, cordial) |
| concordant(adjective, friendly, polite, peaceful, cordial) |
| confiding(adjective, good, close, friendly, loving) |
| congruous(adjective, pleasant, friendly, agreeable, suitable) |
| consistent(adjective, pleasant, friendly, agreeable, suitable) |
| consonant(adjective, pleasant, friendly, agreeable, suitable) |
| conversable(adjective, close, pleasant, friendly, agreeable) |
| conversible(adjective, pleasant, friendly, warm, lively) |
| cool(adjective, kind, pleasant, friendly, agreeable) |
| cooperative(adjective, pleasant, friendly, agreeable, suitable) |
| copacetic(adjective, kind, pleasant, friendly, agreeable) |
| cozy with(expression, adjective, close, friendly, familiar) |