diminution vs slippage

diminution and slippage both are nouns.

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

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

diminution (noun)	slippage (noun)
the act of decreasing or reducing something	failing to hold or slipping out of place
the statement of a theme in notes of lesser duration (usually half the length of the original)	a decrease of transmitted power in a mechanical system caused by slipping
change toward something smaller or lower	decline from a standard level of performance or achievement