1. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Producing or capable of producing an intended result or having a striking effect.
Synonyms
effectuality efficacious effectualness hard-hitting effectual utile strong rough-and-ready useful impressive powerful potent telling effectiveness trenchant stiff impelling effectivity efficient
Antonyms
inefficient impotent useless ineffective ineffectiveness powerless
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2. cost-effective

adjective. Productive relative to the cost.
Synonyms
cost-efficient efficient
Antonyms
inefficient ineffective incompetent

3. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Able to accomplish a purpose; functioning effectively.
Synonyms
competent efficient
Antonyms
incompetent unaggressive invalid

4. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Works well as a means or remedy.
Synonyms
efficacious
Antonyms
inefficacious unprofitable

5. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Exerting force or influence.
Synonyms
operative in force in effect good
Antonyms
inoperative unhelpful inutility uselessness unserviceable

6. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Existing in fact; not theoretical; real.
Synonyms
actual existent
Antonyms
potential powerlessness inefficacy

7. effective

adjective. (ɪˈfɛktɪv, ˈiːfɛktɪv) Ready for service.
Synonyms
operational
Antonyms
nonoperational inexpedient
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