127 entries under hard topic. ×

1
tight(adjective, strong, substantial, compact)
1
unbending(adjective, strong, tough, severe)
1
unsparing(adjective, strong, tough, severe)
0
adamant(adjective, strong, tough, sturdy)
0
astringent(adjective, strong, tough, severe)
0
authoritarian(adjective, strong, tough, sturdy)
0
brick wall(expression, adjective, strong, substantial)
0
bullheaded(adjective, strong, tough, sturdy)
0
by the book(expression, adjective, idiom, strong)
0
close-grained(tough, solid, rigid, inflexible)
0
determined(adjective, strong, tough)
0
dimensional(adjective, strong, substantial, compact)
0
disciplinary(adjective, strong, tough, sturdy)
0
dyed-in-the-wool(adjective, strong, tough, sturdy)
0
ferric(adjective, strong, tough, sturdy)
0
ferrous(adjective, strong, tough, sturdy)
0
fine-grained(tough, solid, rigid, inflexible)
0
flinty(adjective, strong, tough, severe)
0
frowning(adjective, upset, strong, tough)
0
frozen(adjective, compact, dense, rock-hard)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 26 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>