Synonyms|231Antonyms|1|Broader|0Narrower|0Related|38

29 entries under serious topic. ×

4
severe(adjective, strong, hard, tough)
3
hard-line(adjective, strong, hard, tough)
3
relentless(adjective, strong, hard, tough, severe)
3
stern(adjective, severe, persistent, unsympathetic)
1
astringent(adjective, strong, hard, tough, severe)
1
austere(adjective, strong, hard, tough, severe)
1
authoritarian(adjective, strong, hard, tough, severe)
1
bitter(adjective, strong, hard, tough, severe)
1
bullheaded(adjective, strong, hard, tough, severe)
1
by the book(expression, adjective, idiom, strong, hard)
1
cruel(adjective, strong, hard, tough, severe)
1
disciplinary(adjective, strong, hard, tough, severe)
1
dyed-in-the-wool(adjective, set, strong, hard, tough)
1
flinty(adjective, strong, hard, tough, severe)
1
forbidding(adjective, strong, hard, tough, severe)
1
frowning(adjective, strong, hard, tough, severe)
1
grim(adjective, strong, hard, tough, severe)
1
hang-tough(adjective, strong, hard, tough, severe)
1
hard-boiled(adjective, strong, hard, tough, severe)
1
hard-core(adjective, strong, hard, tough, severe)
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APASmart Define. (2013). hard-shell thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hard-shell/thesaurus/synonyms
ChicagoSmart Define. 2013. "hard-shell thesaurus" https://smartdefine.org/hard-shell/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, hard-shell thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hard-shell/thesaurus/synonyms>.
MLASmart Define. "hard-shell thesaurus" 17 June 2013. Web. 21 September 2026. <https://smartdefine.org/hard-shell/thesaurus/synonyms>