Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun investigator

3 senses of investigator

Sense 1
research worker, researcher, investigator -- (a scientist who devotes himself to doing research)
       => scientist -- (a person with advanced knowledge of one or more sciences)

Sense 2
investigator -- (someone who investigates)
       => expert -- (a person with special knowledge or ability who performs skillfully)

Sense 3
detective, investigator, tec, police detective -- (a police officer who investigates crimes)
       => policeman, police officer, officer -- (a member of a police force; "it was an accident, officer")