co-ordinator vs organiser

co-ordinator and organiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
co-ordinator	Yes	No	No	No
organiser	Yes	No	No	No

As nouns, organiser is a hypernym of co-ordinator; that is, organiser is a word with a broader meaning than co-ordinator:

Other hypernyms of co-ordinator include arranger, organizer.

co-ordinator (noun)	organiser (noun)
someone whose task is to see that work goes harmoniously	a lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasks; can serve as a diary or a personal database or a telephone or an alarm clock etc.
	a person who brings order and organization to an enterprise
	someone who enlists workers to join a union