45 entries under feeble topic. ×

25
barren(adjective, weak, slight, poor, thin)
24
unproductive(adjective, weak, slight, thin, small)
21
fruitless(adjective, inferior, inadequate, limited, product)
13
impotent(adjective, weak, inferior, inadequate, limited)
12
useless(adjective, inferior, inadequate, limited)
11
unprofitable(adjective, inadequate, useless, bleak)
11
unsuccessful(adjective, inferior, inadequate, limited)
8
vain(adjective, inferior, inadequate, limited)
7
abortive(adjective, inadequate, limited, product)
7
idle(adjective, inferior, dry, inadequate, limited)
7
ineffectual(adjective, weak, inadequate, limited)
7
worthless(adjective, poor, small, insignificant, inadequate)
5
bootless(adjective, inadequate, limited, useless)
5
unavailing(adjective, inferior, dry, idle, inadequate)
4
futile(adjective, inadequate, useless, bleak)
4
inadequate(adjective, weak, slight, poor, thin)
4
inefficacious(adjective, inadequate, useless, vain)
4
inoperative(adjective, inferior, inadequate, limited)
1
anticlimactic(inadequate, limited, useless, vain)
1
defeasible(inadequate, limited, useless, vain)
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APASmart Define. (2015). unfruitful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unfruitful/thesaurus/synonyms
ChicagoSmart Define. 2015. "unfruitful thesaurus" https://smartdefine.org/unfruitful/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unfruitful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unfruitful/thesaurus/synonyms>.
MLASmart Define. "unfruitful thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unfruitful/thesaurus/synonyms>