There are many other names for a scientist, depending on their specific field and level of expertise. Here are a few examples:

General:

* Researcher

* Scholar

* Academic

* Expert

* Investigator

* Innovator

Specific Fields:

* Biologist

* Chemist

* Physicist

* Astronomer

* Geologist

* Engineer

* Mathematician

* Computer Scientist

* Psychologist

* Sociologist

Specific Roles:

* Professor

* Lecturer

* Postdoctoral Fellow

* Research Assistant

* Lab Technician

Informal:

* Brain

* Geek

* Nerd (sometimes used in a playful or affectionate way)

The best term to use depends on the context and the specific scientist you are referring to.