63 entries under hard topic. ×

1
immovable(adjective, strong, tough, difficult)
1
implacable(adjective, strong, tough, severe)
1
mortified(adjective, strong, tough, severe)
1
mulish(adjective, strong, tough, severe)
1
rigorous(adjective, strong, tough, severe)
1
rough(adjective, strong, tough, harsh)
1
serious(adjective, strong, tough, severe)
1
steely(adjective, strong, tough, severe)
1
stiff-necked(adjective, strong, tough, severe)
1
sturdy(adjective, strong, tough, rugged)
1
unrelenting(adjective, strong, tough, severe)
1
unsparing(adjective, strong, tough, severe)
0
dense(adjective, strong, tough, sturdy)
0
ferric(adjective, strong, tough, sturdy)
0
ferrous(adjective, strong, tough, sturdy)
0
heavy(adjective, strong, tough, sturdy)
0
insensible(adjective, strong, tough, sturdy)
0
robust(adjective, strong, tough, sturdy)
0
rugged(adjective, strong, tough, sturdy)
0
steel(adjective, strong, tough, sturdy)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>