116 entries under serious topic. ×

23
hard-nosed(adjective, clear, strong, hard, tough)
22
exacting(adjective, hard, tough, easy, rough)
21
bitter(adjective, mean, strong, hard, cool)
21
stringent(adjective, hard, tough, rough, firm)
20
sad(adjective, hard, difficult, awful, terrible)
20
unbending(adjective, clear, strong, hard, tough)
19
critical(adjective, hard, tough, difficult, harsh)
19
unfeeling(adjective, person, mean, hard, tough)
18
relentless(adjective, appearance, mean, strong, hard)
17
caustic(adjective, mean, evil, sharp, nasty)
17
dour(adjective, hard, tough, firm, attitude)
17
pitiless(adjective, person, mean, hard, tough)
16
cold(adjective, calm, mean, hard, cool)
16
heavy(adjective, strong, hard, tough, difficult)
16
obdurate(adjective, mean, strong, hard, tough)
16
stiff(adjective, hard, tough, rough, firm)
15
dangerous(adjective, help, bad, hard, tough)
14
inexorable(adjective, appearance, mean, strong, hard)
13
forbidding(adjective, appearance, strong, hard, tough)
13
unsparing(adjective, person, mean, strong, hard)
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APASmart Define. (2016). severe thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/severe/thesaurus/synonyms
ChicagoSmart Define. 2016. "severe thesaurus" https://smartdefine.org/severe/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, severe thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/severe/thesaurus/synonyms>.
MLASmart Define. "severe thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/severe/thesaurus/synonyms>