116 entries under serious topic. ×

90
harsh(adjective, mean, strong, hard, great)
64
hard(adjective, mean, strong, tough, easy)
47
tough(adjective, clear, bad, strong, hard)
47
cruel(adjective, appearance, mean, strong, hard)
45
grave(adjective, calm, quiet, help, hard)
45
oppressive(adjective, hard, tough, rough, firm)
40
strict(adjective, characteristic, strong, hard, tough)
38
austere(adjective, characteristic, appearance, mean, strong)
35
stern(adjective, appearance, mean, hard, tough)
33
rigid(adjective, strong, hard, tough, correct)
33
rough(adjective, mean, bad, strong, hard)
30
weighty(adjective, hard, tough, difficult, honest)
29
acute(adjective, strong, great, severe, sharp)
29
rigorous(adjective, strong, hard, tough, correct)
25
inflexible(adjective, strong, hard, tough, rough)
24
biting(verb, adjective, mean, strong, cool)
24
stubborn(adjective, appearance, strong, hard, tough)
23
cutting(verb, adjective, mean, strong, cool)
23
uncompromising(adjective, clear, hard, tough, rough)
23
grim(adjective, appearance, mean, strong, hard)
10 years ago|63k views|share |citing 
APASmart Define. (2016). severe thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/severe/thesaurus/synonyms
ChicagoSmart Define. 2016. "severe thesaurus" https://smartdefine.org/severe/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, severe thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/severe/thesaurus/synonyms>.
MLASmart Define. "severe thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/severe/thesaurus/synonyms>