chamber orchestra 
noun
A small orchestra.The Service boasts a choir, three concert bands, a chamber orchestra, string orchestra, junior strings, a junior brass group, saxophone group and brass group....
- The school has a strong music department and runs a symphony orchestra, a chamber orchestra, and several quartets.
- Purists, however, might regard arranging a Schubert string quartet for chamber orchestra as a step too far.
- party-liner
- party-lining
- party list
- party machine
- partyman
- party manners
- party-mindedness
- party mix
- party monster
- partyness
- party piano
- party piece
- party plan
- party platform
- party political
- party political broadcast
- party politician
- party politics
- party pooper
- party-pooping
- party popper
- party room
- partyship
- party song
- party spirit