57 entries under rugged topic. ×

14
hard(adjective, mean, strong, tough, severe)
14
severe(adjective, person, mean, strong, hard)
11
cruel(adjective, mean, strong, hard, tough)
11
relentless(adjective, mean, strong, hard, tough)
9
harsh(adjective, mean, strong, hard, tough)
8
strict(adjective, strong, hard, tough, severe)
8
tough(adjective, strong, hard, severe, rough)
6
inexorable(adjective, mean, strong, hard, tough)
6
rigorous(adjective, strong, hard, tough, severe)
6
unrelenting(adjective, mean, strong, hard, tough)
5
austere(adjective, strong, hard, tough, severe)
5
inflexible(adjective, strong, hard, tough, severe)
5
obdurate(adjective, close, strong, hard, tough)
5
rigid(adjective, strong, hard, tough, severe)
4
rough(adjective, strong, hard, tough, difficult)
3
authoritarian(adjective, strong, hard, tough, severe)
3
grim(adjective, mean, strong, hard, tough)
3
unbending(adjective, close, strong, hard, tough)
3
unyielding(adjective, mean, strong, hard, tough)
2
adamant(adjective, strong, hard, tough, sturdy)
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APASmart Define. (2016). unsparing thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unsparing/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsparing thesaurus" https://smartdefine.org/unsparing/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unsparing thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unsparing/thesaurus/synonyms>.
MLASmart Define. "unsparing thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/unsparing/thesaurus/synonyms>