Synonyms|509Antonyms|103|Broader|4Narrower|8Related|587
1
idle
1
in vain
1
incompetent
1
inefficacious
1
inexpedient
1
invalid
1
non-beneficial(adjective, effect, result, outcome)
1
unavailing
1
uneffective
1
unprofitable
1
unskilled
1
vain
1
worthless
0
barren
0
canceled
0
conceptual
0
contraband
0
dependent(adjective, strong, power, valid, legal)
0
derisory
0
disappointing
For more, visit Effectual on Power Thesaurus
11 years ago|1.1k views|share |citing 
APASmart Define. (2015). effectual thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/effectual/thesaurus/antonyms
ChicagoSmart Define. 2015. "effectual thesaurus" https://smartdefine.org/effectual/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, effectual thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/effectual/thesaurus/antonyms>.
MLASmart Define. "effectual thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/effectual/thesaurus/antonyms>