root word curr/curs/cours

courier

a runner, messenger

cursory

quick, as a glance

cursive

flowing writing

corridor

a long, running hallway

precursor

forerunner

current

a running flow, as of water or electricity

courser

a swift-running horse

corsair

one who runs from the law, a pirate

curriculum

the entire run of courses offered to a student

discourse

a long- running speech