The plural form of ensemble is ensembles.

Is there a plural for ensemble?

noun, plural en·sem·bles [ahn-sahm-sahm-buhlz, -sahmbz; French ahn-sahn-bluh]. the united performance of an entire group of singers, musicians, etc. ... the group so performing: a string ensemble.

What type of noun is ensembles?

a group of separate things that contribute to a coordinated whole.