41 entries under hard topic. ×

41
ponderous(adjective, difficult, solid, heavy)
39
weighty(adjective, difficult, solid, heavy)
33
hefty(adjective, person, body, strong)
27
massy(adjective, difficult, big, complex)
25
burly(adjective, difficult, complex, large)
25
lumpish(adjective, difficult, complex, gravity)
24
burdensome(adjective, difficult, complex, gravity)
23
heavyweight(adjective, difficult, heavy, complex)
23
leaden(adjective, difficult, heavy, complex)
22
lumpy(adjective, difficult, complex, gravity)
22
oppressive(adjective, difficult, heavy, complex)
22
severe(adjective, difficult, complex)
20
knotty(adjective, difficult, complex, density)
20
serious(adjective, difficult, complex)
20
tough(adjective, person, body, difficult)
19
dire(adjective, difficult, complex)
19
grave(adjective, difficult, complex)
19
knotted(adjective, difficult, complex, density)
19
rugged(adjective, difficult, complex)
18
profound(adjective, difficult, complex)
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APASmart Define. (2016). massive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/massive/thesaurus/synonyms
ChicagoSmart Define. 2016. "massive thesaurus" https://smartdefine.org/massive/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, massive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/massive/thesaurus/synonyms>.
MLASmart Define. "massive thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/massive/thesaurus/synonyms>