conniving (adj.)
- calculating
- collaborative
- collective
- collectivist
- collectivistic
- collusive
- combined
- commensal
- common
- communal
- communist
- communistic
- concerted
- concordant
- concurrent
- concurring
- cooperative
- designing
- ecumenic
- fellow
- harmonious
- harmonized
- intriguing
- joint
- mutual
- noncompetitive
- reciprocal
- scheming
- symbiotic
- synergetic
- synergic
- synergistic
- uncompetitive
