diminution vs worsening

diminution and worsening both are nouns.

Word	Noun	Adjective	Verb	Adverb
diminution	Yes	No	No	No
worsening	Yes	Yes	No	No

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

diminution (noun)	worsening (noun)
the act of decreasing or reducing something	changing something with the result that it becomes worse
the statement of a theme in notes of lesser duration (usually half the length of the original)	process of changing to an inferior state
change toward something smaller or lower

diminution (adjective)	worsening (adjective)
	changing for the worse