Effective
Productive
Synonyms: Successful, efficacious, constructive, functional, powerful, helpful, of assistance, advantageous, useful, convincing, strong, forcible, plausible, valid, telling, persuasive, credible, conclusive, authoritative, reasoned, well reasoned, lucid, cogent, clear, effectual, productive, fruitful, potent, worthwhile, of help, beneficial, valuable, of use, compelling, forceful, weighty, sound, well founded, impressive, irresistible, influential, unanswerable, logical, reasonable, rational, coherent, eloquent, and articulate.
Operative
Synonyms: Operative, in effect, valid, signed and sealed, legal, legitimate, binding, in force, in operation, official, lawful, licit, legally binding, and effectual.
Essential
Example Sentences
Her communication skills are very effective.
Exercise is effective for stress relief.
The new strategy proved highly effective.
Consistent practice is always effective eventually.