originate vs initiate

originate is not a noun while initiate is a noun.

Word	Noun	Adjective	Verb	Adverb
originate	No	No	Yes	No
initiate	Yes	No	Yes	No

As verbs, originate and initiate are synonyms defined as:

Other synonyms of originate include start.

As verbs, initiate is a hyponym of originate; that is, initiate is a word with a more specific, narrower meaning than originate:

Other hyponyms of originate include lead up, set, date back, date from, go back.

originate (noun)	initiate (noun)
	people who have been introduced to the mysteries of some field or activity
	someone who has been admitted to membership in a scholarly field
	someone new to a field or activity

originate (verb)	initiate (verb)
bring into being	set in motion, start an event or prepare the way for
come into existence; take on form or shape	bring up a topic for discussion
begin a trip at a certain point, as of a plane, train, bus, etc.	take the lead or initiative in; participate in the development of
	bring into being
	accept people into an exclusive society or group, usually with some rite