Synset

producing or capable of producing an intended result or having a striking effect
<adj.all>   freq. cnt.: 29 freq. cnt.: 29

effective

effectual

efficacious

sample sentences

"an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford
"effective teaching methods"
"effective steps toward peace"
"made an effective entrance"
"his complaint proved to be effectual in bringing action"
"an efficacious law"