255 entries under adjective topic. ×

19
massy(hard, difficult, complex)
19
punishing(hard, difficult, complex)
19
toilsome(hard, difficult, complex)
18
arduous(hard, difficult, complex)
18
heavyweight(hard, difficult, complex)
18
grievous(hard, difficult, complex)
14
gloomy(dull, obscure, dark, heavy)
14
listless(action, dull, quiet, weak)
13
torpid(dull, quiet, weak, easy)
12
languid(action, dull, weak, easy)
11
dreary
11
slow(dull, weak, easy, relaxed)
10
ashen(dull, soft, obscure, lead)
10
inert(dull, quiet, weak, moving)
9
dingy(dull, soft, obscure, lead)
9
lackadaisical(action, dull, quiet, weak)
9
lethargic(dull, quiet, weak, easy)
9
lifeless(dull, soft, obscure, flat)
8
boring(dull, flat, lifeless, dreary)
8
dense(heavy, gloomy, gray, overcast)
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APASmart Define. (2015). leaden thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/leaden/thesaurus/synonyms
ChicagoSmart Define. 2015. "leaden thesaurus" https://smartdefine.org/leaden/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, leaden thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/leaden/thesaurus/synonyms>.
MLASmart Define. "leaden thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/leaden/thesaurus/synonyms>