scansion vs cadence

scansion and cadence both are nouns.

Word	Noun	Adjective	Verb	Adverb
scansion	Yes	No	No	No
cadence	Yes	No	No	No

As nouns, cadence is a hypernym of scansion; that is, cadence is a word with a broader meaning than scansion:

Other hypernyms of scansion include beat, measure, meter, metre.

scansion (noun)	cadence (noun)
analysis of verse into metrical patterns	a recurrent rhythmical series
	the close of a musical section
	(prosody) the accent in a metrical foot of verse