du·op·o·ly 
(d-ŏpə-lē, dy-)
(d-ŏpə-lē, dy-)n. pl. du·op·o·lies
An economic or political condition in which power is concentrated in two persons or groups.
[DUO- + (MONO)POLY.]
- social promotion
- social psychiatrist
- social psychiatry
- social psychologist
- social psychology
- social register
- social science
- social scientist
- social secretary
- social security
- social service
- social studies
- social work
- social worker
- societal
- societally
- society
- Society Islands
- Society of Friends
- Society of Jesus
- Socinian
- Socinianism
- Socinus
- socio-
- sociobiological