caster

nouns

a worker who casts molten metal into finished products
caster
is derived from
cast
is a type of (narrower)
a person who works at a specific occupation
"he is a good worker"
worker
a shaker with a perforated top for sprinkling powdered sugar
caster, castor
a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable
caster, castor