Использовать суффиксы префиксы к словам: to sail, to connect, to educate,to build,to create,friend,leader,fellow,dark,weak,cold,bright,free

To sail - sailor

to connect - disconnect, connection, connector, connecting, connected

to educate - education, educating, educated, educator

to build -rebuild, building, builder

to create - creator, creature, creating, created

friend - friendship, friendly

leader - mislead, (mis)leading, leadrership, leader

fellow - fellowship

dark - darkness, to darken, darkly

weak - weakness, to weaken, weakly

cold - coldness, coldly

bright - brightness, to brighten, brightening, brightly

free - freedom, freely