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A person living on investments is a person of independent means or a person who is retired.
Biologically it is the lumen.
singer, vocalist
A cartographer
A person living in a rural area is typically referred to as a villager or a rural resident.
Mick
musician, athlete, actor
domicile
A baker.
marine biologist... is an aquatics person! Ichthyologist
renal filtrate
A Typist is a person that types. People that type for a living are also secretary.