gumshoe
Definitions
A detective, especially a private investigator.
A rubber-soled shoe, such as an overshoe, designed for quiet movement.
Examples
The seasoned gumshoe spent hours tailing the suspect through the rain-slicked streets of the city.
After years of working as a private gumshoe, he had developed a sharp instinct for spotting a lie.
Synonyms
detective private investigator sleuth private eye investigator shamus