synergistic (adj.)
- accompanying
- accordant
- associate
- coincident
- collaborative
- collective
- collectivist
- collectivistic
- collusive
- combined
- combining
- commensal
- common
- communal
- communist
- communistic
- concerted
- concomitant
- concordant
- concurrent
- concurring
- conjoint
- conniving
- conspiratorial
- cooperative
- coordinate
- ecumenic
- fellow
- harmonious
- harmonized
- joint
- meeting
- mutual
- noncompetitive
- parasitic
- reciprocal
- saprophytic
- symbiotic
- synchronous
- synergetic
- synergic
- uncompetitive
- united
