synchronise vs occur

synchronise and occur both are verbs.

Word	Noun	Adjective	Verb	Adverb
synchronise	No	No	Yes	No
occur	No	No	Yes	No

As verbs, occur is a hypernym of synchronise; that is, occur is a word with a broader meaning than synchronise:

Other hypernyms of synchronise include come about, fall out, go on, hap, happen, pass, pass off, take place.

synchronise (verb)	occur (verb)
make synchronous and adjust in time or manner	come to pass
operate simultaneously	come to one's mind; suggest itself
cause to indicate the same time or rate	to be found to exist
arrange or represent events so that they co-occur
make (motion picture sound) exactly simultaneous with the action
happen at the same time