action group 
(also action committee)
noun
A body formed to campaign politically on a particular issue: [as name]: the Child Poverty Action Group...
- He said the long term viability of the house could be worked out with the assistance of the action group and the bodies represented in it.
- The latest march is being organised by an action group formed by meatworkers and residents.
- After the first flood, we had set up an action group to campaign for flood defences for Malton and Norton.
- night shelter
- night shift
- nightshirt
- night-shirted
- nightside
- night-sight
- night sitting
- night sky
- night sleep
- night snake
- night soil
- night-song
- night-spell
- nightspot
- nightstand
- night star
- night starvation
- nightstick
- night-stool
- night stop
- night storage heater
- night storage radiator
- night-stored
- night-swallow
- night sweat