ease vs quiescency

ease and quiescency both are nouns.

Word	Noun	Adjective	Verb	Adverb
ease	Yes	No	Yes	No
quiescency	Yes	No	No	No

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

Other hyponyms of ease include bed rest, bedrest, laziness, lie-in, dormancy, quiescence, sleeping, leisure.

ease (noun)	quiescency (noun)
freedom from activity (work or strain or responsibility)	quiet and inactive restfulness
freedom from difficulty or hardship or effort	a state of quiet (but possibly temporary) inaction
freedom from constraint or embarrassment
a freedom from financial difficulty that promotes a comfortable state
the condition of being comfortable or relieved (especially after being relieved of distress)

ease (verb)	quiescency (verb)
lessen pain or discomfort; alleviate
make easier
lessen the intensity of or calm
move gently or carefully