someone who is trained in science, especially someone whose job is to do scientific research
someone who writes music, especially classical music
someone who has invented something or whose job is to invent things
someone who designs or builds things such as roads, railways, bridges, or machines
someone who makes paintings, sculptures etc
someone who works on a boat or ship
someone who travels and works in space
someone who travels to a place that other people do not know much about in order to find out what is there
someone whose job is to design buildings
