During and following Galactic Colonization, humans adopted gendered titles. There were neuter, feminine, and masculine titles. The base word comes first followed by the gendering modifier.

Neuter: Unmodified or shortened (compared to Earth English)
Feminine: -tress, -stress
Masculine: -ter, -ster

Examples (neuter, feminine, masculine):
Doctor, Docstress, Docster
Programmer, Programstress, Programster
King, Kingstress, Kingster
Scientist, Scientistress, Scientister