affinity group 
noun chiefly US
A group of people linked by a common interest or purpose: feminist and lesbian affinity groups...
- In the session we learned at least two important lessons: the need to establish and maintain links with other members of an affinity group and the usefulness of vinegar in dealing with the effects of tear gas.
- An affinity group of older women from Montreal, were the first to approach the fence.
- I quickly began searching for my affinity group.
- marcher
- marcher lord
- marcher lordship
- marchership
- Marches
- marchesa
- marchese
- Marcheshvan
- Marchesvan
- March fly
- march fracture
- March, Fredric
- March hare
- Marchi
- marching band
- marching camp
- marching girl
- marching jazz
- marching money
- marching order
- marching orders
- marching season
- marching song
- marching watch
- marchioness