verbs
bring into being
"He initiated a new program"; "Start a foundation"
take the lead or initiative in; participate in the development of
"This South African surgeon pioneered heart transplants"
accept people into an exclusive society or group, usually with some rite
"African men are initiated when they reach puberty"
bring up a topic for discussion
set in motion, start an event or prepare the way for
"Hitler's attack on Poland led up to World War II"