English Theasurus that shows all the ways the English word is translated from the original Greek and Hebrew.
English Theasurus from the Hebrew and Greek Strong's Dictionary
effectual 1753 ** energeia ** operation, strong, ({effectual}) working.
effectual 1754 ** energeo ** do, (be) {effectual} (fervent), be mighty in, shew forthself, work (effectually in).
effectual 1756 ** energes ** {effectual}, powerful.
effectually 1754 ** energeo ** do, (be) effectual (fervent), be mighty in, shew forthself, work ({effectually} in).