bus driver
synesthete
Triathlete
movie pirates
A button collector??
You can call that person a "singer" or you can call that person a "vocalist."
a Chauffeur, a driver
someone who works for a business
A fleet of buses.
An employee
A gardener.
demonologist
a horticulturalist
collector
Mason
coach
A person who works with gold is called a goldsmith.
Chemist