64 entries under feeble topic. ×

47
ineffectual(adjective, dull, light, weak, soft)
35
useless(adjective, weak, poor, failure, base)
25
futile(adjective, weak, poor, base, careless)
24
worthless(adjective, weak, poor, base, careless)
23
impotent(adjective, weak, poor, failure, silly)
22
incompetent(adjective, weak, poor, careless, stupid)
21
weak(adjective, dull, light, soft, poor)
16
inadequate(adjective, dull, light, weak, soft)
12
feckless(adjective, stupid, idle, useless)
12
insufficient(adjective, weak, failure, inadequate)
11
spineless(adjective, weak, poor, inferior, inadequate)
11
unfit(adjective, weak, appropriate, ready, inadequate)
9
lame(adjective, weak, poor, inferior, inadequate)
9
meaningless(adjective, weak, poor, base, careless)
7
good-for-nothing(adjective, weak, poor, base, careless)
7
null(adjective, inferior, inadequate, useless)
6
unfruitful(adjective, weak, inferior, inadequate, product)
5
aimless(adjective, weak, careless, insignificant)
5
flimsy(weak, inadequate, useless, inappropriate)
5
namby-pamby(adjective, weak, mediocre, indecisive)
10 years ago|23k views|share |citing 
APASmart Define. (2016). ineffective thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ineffective/thesaurus/synonyms
ChicagoSmart Define. 2016. "ineffective thesaurus" https://smartdefine.org/ineffective/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ineffective thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ineffective/thesaurus/synonyms>.
MLASmart Define. "ineffective thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/ineffective/thesaurus/synonyms>