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Effective vs Useful - What's the difference?

effective | useful |

Useful is a antonym of effective.



As adjectives the difference between effective and useful

is that effective is having the power to produce a required effect or effects while useful is having a practical or beneficial use.

As a noun effective

is a soldier fit for duty.

effective

English

Adjective

(en adjective)
  • Having the power to produce a required effect or effects.
    • The pill is an effective method of birth control.
  • Producing a decided or decisive effect.
    • The president delivered an effective speech!
  • * Jeremy Taylor
    • Whosoever is an effective , real cause of doing his neighbour wrong, is criminal.
  • Efficient, serviceable, or operative, available for useful work.
    • How long does it take to make a bunch of civilians an effective military force?
    My effective income after taxes and child support is $500 a month.
    The effective radiated power is determined by multiplying the transmitter power output with the antenna gain.
    The effective voltage of an alternating current is 0.7 times its peak voltage.
  • Actually in effect.
    • The curfew is effective at midnight.
  • Having no negative coefficients.

    • Related terms

    * effect * effectivity * effectual * efficacious * efficacity * efficacy * efficiency * efficient

    Noun

    (en noun)
  • (military) A soldier fit for duty.
  • *1876 , , Recollections of the Elkhorn Campaign :
  • *:The Army of the West reached Corinth sometime after the battle of Shiloh. We were 15,000 effectives , and brought Beauregard's effective force up to 45,000 men.
    • ----

    useful

    English

    Adjective

    (en adjective)
  • Having a practical or beneficial use.
  • * {{quote-magazine, year=2013, month=July-August, author= Lee S. Langston, magazine=(American Scientist)
    • , title= The Adaptable Gas Turbine , passage=Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo'', meaning ''vortex , and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.}}

    Usage notes

    * Prepositions: useful'' is used in ''useful for '', ''useful for '' and ''useful to ''. The words ''useful to'' are also found in construction such as ''It is useful to do'', in which ''to marks an infinitive rather than being a preposition.

    Synonyms

    * noteful * serviceable * utilitarian

    Antonyms

    * unuseful * useless * harmful

    Related terms

    * usefully * usefulness