cadency vs rhythmicity

cadency and rhythmicity both are nouns.

Word	Noun	Adjective	Verb	Adverb
cadency	Yes	No	No	No
rhythmicity	Yes	No	No	No

As nouns, rhythmicity is a hypernym of cadency; that is, rhythmicity is a word with a broader meaning than cadency:

cadency: a recurrent rhythmical series
rhythmicity: the rhythmic property imparted by the accents and relative durations of notes in a piece of music

cadency (noun)	rhythmicity (noun)
a recurrent rhythmical series	the rhythmic property imparted by the accents and relative durations of notes in a piece of music