Fed and Flatfoot

Fed noun - Any federal law-enforcement officer.

Flatfoot and fed are semantically related In some cases you can use "Flatfoot" instead a noun "Fed".

Flatfoot noun - A member of a force charged with law enforcement at the local level.

Fed and flatfoot are semantically related in person topic. You can use "Fed" instead a noun "Flatfoot", if it concerns topics such as policeman, lawman, investigator of crime, law enforcement officer.