125 entries under weak topic. ×

47
ineffective(adjective, dull, light, soft)
35
useless(adjective, poor, failure, base)
30
unavailing(adjective, poor, failure, base)
29
futile(adjective, poor, base, careless)
26
feeble(adjective, dull, strong, light)
25
impotent(adjective, strong, ability, poor)
24
unproductive(adjective, poor, base, silly)
23
inefficient(adjective, thin, delicate, failure)
20
fruitless(adjective, failure, silly, stupid)
20
vain(adjective, stupid, insignificant, inadequate)
20
worthless(adjective, poor, base, careless)
18
incompetent(adjective, poor, thin, delicate)
16
inadequate(adjective, dull, mean, strong, light)
16
unsuccessful(adjective, inadequate, limited, feeble)
14
idle(adjective, stupid, inadequate, limited)
14
sterile(adjective, poor, base, inferior)
13
powerless(adjective, strong, ability, thin)
12
unable(adjective, skill, inadequate, limited)
12
barren(adjective, poor, base, inferior)
12
inept(adjective, poor, stupid, idle)
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APASmart Define. (2016). ineffectual thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ineffectual/thesaurus/synonyms
ChicagoSmart Define. 2016. "ineffectual thesaurus" https://smartdefine.org/ineffectual/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, ineffectual thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ineffectual/thesaurus/synonyms>.
MLASmart Define. "ineffectual thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/ineffectual/thesaurus/synonyms>