functional vs serviceable

functional and serviceable both are adjectives.

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

functional (adjective)	serviceable (adjective)
designed for or capable of a particular function or use	ready for service or able to give long service
involving or affecting function rather than physiology	intended or able to serve a purpose without elaboration
relating to or based on function especially as opposed to structure	capable of being put to good use
(of e.g. a machine) performing or capable of performing
designed for or adapted to a function or use
fit or ready for use or service