falls vs cascade

falls and cascade both are nouns.

Word	Noun	Adjective	Verb	Adverb
falls	Yes	No	No	No
cascade	Yes	No	Yes	No

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

Other hyponyms of falls include cataract.

falls (noun)	cascade (noun)
a steep descent of the water of a river	a sudden downpour (as of tears or sparks etc) likened to a rain shower
the petals or sepals of a flower that bend downward (especially the outer perianth of an iris)	a succession of stages or operations or processes or units
	a small waterfall or series of small waterfalls

falls (verb)	cascade (verb)
	arrange (open windows) on a computer desktop so that they overlap each other, with the title bars visible
	rush down in big quantities, like a cascade