45 entries under feeble topic. ×

32
futile(adjective, weak, flat, sad, unhappy)
28
vain(adjective, weak, flat, sad, unhappy)
27
useless(adjective, weak, flat, failure, inferior)
24
unproductive(adjective, weak, flat, silly, stupid)
24
bootless(adjective, failure, stupid, idle, inadequate)
24
unavailing(adjective, weak, failure, silly, stupid)
22
unfruitful(adjective, inferior, inadequate, limited, product)
21
ineffectual(adjective, weak, failure, silly, stupid)
21
unprofitable(adjective, flat, silly, stupid, inadequate)
21
abortive(adjective, failure, stupid, idle, inadequate)
19
barren(adjective, inferior, inadequate, limited, product)
19
unsuccessful(adjective, weak, inferior, inadequate, limited)
14
idle(adjective, weak, stupid, inadequate, limited)
13
worthless(adjective, stupid, inadequate, limited)
8
impotent(adjective, weak, failure, silly, stupid)
6
inoperative(adjective, weak, stupid, inferior, idle)
5
nugatory(adjective, failure, inferior, inadequate, limited)
5
unavailable(adjective, stupid, idle, inadequate, product)
4
inadequate(adjective, weak, limited, useless)
3
inefficient(adjective, weak, failure, inferior, inadequate)
<123>
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APASmart Define. (2016). fruitless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fruitless/thesaurus/synonyms
ChicagoSmart Define. 2016. "fruitless thesaurus" https://smartdefine.org/fruitless/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, fruitless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fruitless/thesaurus/synonyms>.
MLASmart Define. "fruitless thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/fruitless/thesaurus/synonyms>