139 entries under tough topic. ×

2
strong(adjective, hard, cold, sturdy)
2
tyrannical(adjective, hard, evil, nasty)
2
vindictive(adjective, mean, hard, severe)
1
aloof(adjective, firm, fixed, rigid)
1
antagonistic(adjective, harsh, cruel, grim)
1
avaricious(adjective, hard, harsh, cruel)
1
bloody(adjective, hard, harsh, violent)
1
bullhead(adjective, mean, hard, harsh)
1
by the book(expression, adjective, idiom, strong, hard)
1
cold-blooded(adjective, mean, evil, nasty)
1
cold fish(expression, adjective, mean, hard)
1
cussed(adjective, hard, severe, firm)
1
disciplinary(adjective, strong, hard, severe)
1
distressing(adjective, harsh, cruel, grim)
1
dyed-in-the-wool(adjective, set, strong, hard)
1
formal(adjective, strong, severe, firm)
1
frowning(adjective, strong, hard, severe)
1
grievous(adjective, harsh, cruel, grim)
1
hang-tough(adjective, strong, hard, harsh)
1
hard-boiled(adjective, mean, strong, hard)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 30 September 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>