synchronise vs hap

synchronise is not a noun while hap is a noun.

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

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

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

synchronise (noun)	hap (noun)
	an accidental happening

synchronise (verb)	hap (verb)
make synchronous and adjust in time or manner	come to pass
operate simultaneously
cause to indicate the same time or rate
arrange or represent events so that they co-occur
make (motion picture sound) exactly simultaneous with the action
happen at the same time