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effective(Efficient), adjective able, adapted, advantageous, capable, competent, convenient, effectual, efficacious, efficax, equal to, expedient, fit, handy, helpful, implemental, instrumental, of service, of use, practicable, practical, pragmatic, proficient, profitable, serviceable, skillful, successful, to the purpose, unerring, up to, useful, utilitarian, valid
effective(Operative), adjective active, at work, fit for use, having legal force, in action, in effect, in force, in operation, operational, ready for use, usable, valid, working
Associated concepts: effective assignment, effective at death, effective date, effective dissolution
See also: active, capable, causal, cogent, competent, constructive, efficient, eloquent, expert, felicitous, functional, important, incisive, influential, material, omnipotent, operative, persuasive, politic, potent, powerful, practical, predominant, prevailing, proficient, sound, strong, successful, valid, valuable, viable