serviceability vs serviceable

serviceability is a noun but serviceable is not a noun.

Word	Noun	Adjective	Verb	Adverb
serviceability	Yes	No	No	No
serviceable	No	Yes	No	No

serviceability (noun)	serviceable (noun)
the quality of being able to provide good service

serviceability (adjective)	serviceable (adjective)
	ready for service or able to give long service
	intended or able to serve a purpose without elaboration
	capable of being put to good use