Synonyms for Serviceable (same or very similar meaning)
WordNet sense 1 (being of use or service):
useful, utileWordNet sense 2 (fit or ready for use or service):
usableWordNet sense 3 (serviceable for a long time):
durableWordNet sense 4 (concerned with actual use or practice):
practicalFrom the ODE community, based on WordNetadd/edit