efficacy
The word “efficacy” has 4 syllables: ef-fi-ca-cy
It's pronounced as /ˈɛfɪkəsi/
What is synonym and antonym for efficacy?
In the thesaurus, “efficacy” has 28 synonyms and 21 antonyms.
Here are synonyms and antonyms for efficacy along with examples of usage in sentences.
Synonyms for efficacy
- ability
- adequacy
- capability
- capableness
- capacity
- competence
- edge
- effect
- effectiveness
- effectualness
- efficaciousness
- efficacity
- efficiency
- energy
- force
- influence
- performance
- potency
- power
- productiveness
- puissance
- strength
- success
- sufficiency
- use
- vigor
- virtue
- weight
Antonyms for efficacy
- enervation
- failure
- idleness
- impotence
- inability
- inactivity
- inadequacy
- inadequateness
- incapacity
- incompetence
- incompetency
- ineffectiveness
- ineffectuality
- ineffectualness
- inefficacy
- inefficiency
- lethargy
- powerlessness
- unproductiveness
- uselessness
- weakness
Meanings of efficacy
- noun
- Ability to produce a desired effect under ideal testing conditions.
- Degree of ability to produce a desired effect.
Example Sentences
- The efficacy of the vaccine was demonstrated by the significant decrease in infection rates.
- Studies have shown the efficacy of mindfulness meditation in reducing stress and anxiety.
- The company conducted trials to assess the efficacy of its new product before launching it to the market.
- The therapist explained the efficacy of cognitive-behavioral therapy in treating various mental health conditions.
- Public health campaigns aim to increase awareness about the efficacy of handwashing in preventing the spread of diseases.
On this page you'll find 49 synonyms, antonyms, or another words to efficacy, such as: ability, adequacy, capability, capableness, capacity, competence, edge.
Make sure to choose synonyms and antonyms that are appropriate for the context of the sentence.
Related Words
validity
- acceptability
- adequacy
- adequateness
- agreeableness
- appeal
- applicability
- appositeness
- appropriateness
- aptness
- authoritativeness
- authority
- bearing
- believability
- cogency
- compatibility
- conclusiveness
- congruity
- connection
- convenience
- convincingness
- credibility
- definitiveness
- effectiveness
- efficacy
- expedience
- expediency
- felicitousness
- felicity
- fitness
- fittingness
- force
- forcefulness
- foundation
- gravity
- grounds
- happiness
- harmoniousness
- impact
- influence
- justifiability
- legality
- legitimacy
- materiality
- might
- persuasion
- persuasiveness
- pertinence
- point
- potency
- power
- properness
- propriety
- punch
- relevance
- relevancy
- right
- rightness
- satisfactoriness
- seductiveness
- seemliness
- serviceableness
- soundness
- strength
- suasiveness
- substance
- suitability
- suitableness
- sway
- usefulness
- validness
- weight
edge
- ability
- acerbity
- acidity
- acidness
- acridity
- acridness
- acrimoniousness
- acrimony
- acuteness
- advantage
- allowance
- ambit
- ascendancy
- ascendency
- asperity
- benefit
- berm
- better
- bind
- bite
- bitterness
- blessing
- boon
- border
- borderland
- borderline
- bound
- boundary
- break
- brim
- brink
- bulge
- capability
- capacity
- catbird seat
- cattiness
- ceiling
- check
- circle
- circumference
- circumscribe
- coign of vantage
- command
- compass
- confine
- confines
- contour
- control
- corner
- creep
- crest
- curb
- cusp
- decorate
- define
- delineate
- demarcate
- demarcation
- dominance
- draw
- drop
- ease
- edging
- effectiveness
- effectualness
- efficaciousness
- efficacity
- efficacy
- efficiency
- encircle
- enclose
- end
- environ
- extent
- extremity
- felicity
- file
- foothold
- frame
- fringe
- frontier
- ginger
- girdle
- girth
- godsend
- grind
- harshness
- head start
- hem
- high ground
- hone
- inch
- inclose
- infiltrate
- inside track
- jump
- keenness
- lap
- lead
- ledge
- leg up
- limit
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- line
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- maliciousness
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- march
- margin
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- maximum
- measure
- mere
- molding
- mouth
- nick
- nose out
- odds
- opportunity
- outline
- outskirt
- outskirts
- pale
- perimeter
- periphery
- poignance
- poignancy
- point
- pointedness
- polish
- portal
- potency
- precedence
- predominance
- preference
- prerogative
- privilege
- productiveness
- puissance
- pull
- punch
- pungency
- raucousness
- restrain
- restrict
- restriction
- rim
- ring
- roughness
- round
- selvage
- seniority
- severeness
- severity
- shape
- sharpen
- sharpness
- shore
- shrillness
- side
- sidle
- silhouette
- sketch
- skirt
- skirting
- slip by
- slip past
- spice
- split
- squeeze by
- squeeze past
- start
- stead
- steal
- stone
- strand
- strength
- strop
- superiority
- supremacy
- surround
- tang
- tartness
- term
- termination
- thorniness
- threshold
- trace
- transcendence
- transcendency
- trim
- trimming
- upper hand
- vantage
- verge
- virulence
- vitriol
- wall
- whet
- whip hand
- windfall
- worm
effect
- achieve
- action
- actualize
- actuate
- advance
- afterclap
- aftereffect
- afterglow
- aftermath
- aftershock
- appointments
- authority
- backlash
- backwash
- beget
- begin
- belongings
- blowback
- breed
- bring
- bring about
- bring forth
- bring off
- bring on
- buy
- by-product
- can of worms
- carry through
- catalyze
- causatum
- cause
- chain reaction
- chattels
- child
- clout
- collateral
- command
- complete
- conceive
- conclude
- conclusion
- consequence
- consummate
- corollary
- create
- cultivate
- decide
- denouement
- determine
- develop
- development
- do
- do a number
- do the job
- do the trick
- do to a T
- domination
- dominion
- draw on
- drift
- duds
- echo
- effectuate
- efficacy
- efficiency
- enact
- encourage
- end
- end product
- enforce
- enforcement
- engender
- essence
- establish
- estate
- event
- eventuality
- execute
- execution
- fact
- fallout
- fate
- father
- fixtures
- flak
- follow through
- follow-up
- force
- forward
- foster
- found
- fruit
- fulfill
- furnishings
- further
- gear
- generate
- get across
- get to
- give rise to
- goods
- holdings
- impact
- implement
- implementation
- implication
- import
- importance
- imprint
- inaugurate
- induce
- influence
- initiate
- innovate
- institute
- introduce
- invoke
- issue
- launch
- make
- make it
- make waves
- mark
- mastery
- matter of course
- meaning
- movables
- moveables
- nourish
- nurture
- occasion
- offshoot
- outcome
- outgrowth
- paraphernalia
- perform
- personal effects
- personal property
- personalty
- pioneer
- plunder
- possession
- power
- precipitate
- prestige
- procure
- produce
- product
- promote
- prompt
- property
- pull
- pull it off
- purport
- purpose
- pursuance
- put across
- ramification
- reaction
- reality
- realize
- reflex
- render
- repercussion
- response
- result
- resultant
- ripple
- secure
- sell
- sense
- sequel
- sequence
- set
- set up
- side effect
- side reaction
- significance
- sovereignty
- sovranty
- spawn
- spin-off
- start
- strength
- stuff
- supremacy
- sway
- tangibles
- tenor
- things
- treasures
- turn out
- turn the trick
- unzip
- upshot
- use
- validity
- valuables
- vigor
- waves
- weight
- work
- yield
effectiveness
- ability
- appeal
- attraction
- authoritativeness
- authority
- believability
- capability
- capacity
- charm
- cogency
- conclusiveness
- convincingness
- credibility
- definitiveness
- edge
- effectualness
- efficaciousness
- efficacity
- efficacy
- efficiency
- fascination
- force
- forcefulness
- impact
- importance
- influence
- might
- payoff
- persuasion
- persuasiveness
- point
- potency
- power
- productiveness
- puissance
- punch
- seductiveness
- significance
- soundness
- strength
- suasiveness
- success
- sway
- validity
- validness
- vigor
- weight
effectualness
- ability
- capability
- capacity
- cogency
- edge
- effectiveness
- effectuality
- efficaciousness
- efficacity
- efficacy
- efficiency
- influence
- potency
- power
- productiveness
- puissance
- strength
- success