(n): artist who composes or conducts music as a profession
(n): a substance that readily conducts e.g. electricity and heat
(n): the tangible substance that goes into the makeup of a physical object
(n): the person who collects fares on a public conveyance
(n): a person who is employed to collect payments (as for rent or taxes)
(n): a device designed to transmit electricity, heat, etc.
(n): an instrumentality invented for a particular purpose
