N. utility, usefulness, efficacy, efficiency, adequacy, service, use, stead, avail, help, applicability, subservience, function, value, worth, money's worth, productiveness, cui bono, utilization step in the right direction, common weal, commonwealth public good, public interest, utilitarianism

V. be useful, avail, serve, subserve, conduce, answer, serve one's turn, answer a purpose, serve a purpose, act a part, perform a function, discharge a function &c, render a service, render good service, render yeoman's service, bestead, stand one in good stead be the making of, help, bear fruit, bring grist to the mill, profit, remunerate, benefit, find one's account in, find one's advantage in, reap the benefit of, render useful

Adj. useful, of use, serviceable, proficuous|, good for, subservient, conducive, subsidiary, advantageous, profitable, gainful, remunerative, worth one's salt, valuable, prolific, adequate, efficient, efficacious, effective, effectual, expedient, applicable, available, ready, handy, at hand, tangible, commodious, adaptable, of all work

Adv. usefully, pro bono publico