58 entries under difficult topic. ×

47
grave(adjective, dull, hard, great, tough)
46
serious(adjective, good, dull, hard, great)
36
massive(adjective, hard, heavy, complex)
35
ponderous(adjective, hard, big, heavy)
35
burdensome(adjective, hard, heavy, complex)
35
hefty(adjective, hard, harsh, solid)
31
grievous(adjective, hard, great, tough, severe)
30
severe(adjective, hard, tough, honest)
29
oppressive(adjective, hard, heavy, complex)
25
tough(adjective, hard, heavy, complex)
24
ambitious(adjective, hard, importance, complex)
24
heavy(adjective, tough, severe, harsh)
24
profound(adjective, hard, complex, thoughtful)
24
taxing(adjective, hard, heavy, complex)
23
heavyweight(adjective, hard, heavy, important)
23
leaden(adjective, hard, heavy, complex)
22
hard(adjective, heavy, complex)
22
trying(adjective, hard, heavy, complex)
21
arduous(adjective, hard, heavy, complex)
21
backbreaking(adjective, hard, heavy, complex)
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APASmart Define. (2015). weighty thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/weighty/thesaurus/synonyms
ChicagoSmart Define. 2015. "weighty thesaurus" https://smartdefine.org/weighty/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, weighty thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/weighty/thesaurus/synonyms>.
MLASmart Define. "weighty thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/weighty/thesaurus/synonyms>