metrical foot vs cadence

metrical foot and cadence both are nouns.

Word	Noun	Adjective	Verb	Adverb
metrical foot	Yes	No	No	No
cadence	Yes	No	No	No

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

metrical foot: (prosody) a group of 2 or 3 syllables forming the basic unit of poetic rhythm
cadence: (prosody) the accent in a metrical foot of verse

Other hypernyms of metrical foot include beat, measure, meter, metre.

metrical foot (noun)	cadence (noun)
(prosody) a group of 2 or 3 syllables forming the basic unit of poetic rhythm	a recurrent rhythmical series
	the close of a musical section
	(prosody) the accent in a metrical foot of verse