synchronicity vs synchrony

synchronicity and synchrony both are nouns.

Word	Noun	Adjective	Verb	Adverb
synchronicity	Yes	No	No	No
synchrony	Yes	No	No	No

As nouns, synchronicity and synchrony are synonyms defined as:

synchronicity and synchrony: the relation that exists when things occur at the same time

Other synonyms of synchronicity include synchroneity, synchronisation, synchronism, synchronization, synchronizing.

synchronicity (noun)	synchrony (noun)
the relation that exists when things occur at the same time	the relation that exists when things occur at the same time