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Thesaurus / in efficacious
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synonyms for in efficacious

  • ineffective
  • inoperative
  • invalid
  • unreal
  • worthless
  • bad
  • barren
  • imaginary
  • negative
  • nothing
  • void
  • absent
  • characterless
  • inefficacious
  • nonexistent
  • null and void
  • powerless
  • unavailing
  • unsanctioned
  • useless
  • vain

antonyms for in efficacious

MOST RELEVANT
  • competent
  • effective
  • effectual
  • efficient
  • powerful
  • strong
  • useful
  • able
  • capable
  • competent
  • dexterous
  • effective
  • fit
  • neat
  • skillful
  • sound
  • strong
  • tidy
  • efficient
  • expert
  • useful
          Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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