Related to casting or actors:
* Castaway (a person shipwrecked or stranded)
* Castoff (something discarded or rejected)
* Castanet (a musical instrument consisting of two small, hollow shells clicked together)
* Caste (a rigid social hierarchy)
* Broadcast (to transmit information or entertainment by radio or television)
* Outcast (a person who is rejected or ostracized)
Related to casting (in the sense of throwing or shaping):
* Casting (the act or process of throwing or shaping)
* Casting (a mold or form used to shape liquid metal)
* Casting (a group of actors in a play, film, or television show)
* Cast iron (an alloy of iron and carbon)
* Casting vote (a decisive vote in a tie)
Other:
* Cast-off (a discarded garment)
* Cast-iron (very strong or rigid)
* Cast-off (to reject or abandon)
These are just some examples, and the exact meaning of a compound word will often depend on the context in which it is used.