cadence vs scansion

cadence and scansion both are nouns.

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

As nouns, scansion is a hyponym of cadence; that is, scansion is a word with a more specific, narrower meaning than cadence:

Other hyponyms of cadence include catalexis, common measure, common meter, foot, metrical foot, metrical unit.

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