120 entries under severe topic. ×

54
tough(adjective, action, strong, hard, sound)
49
rough(adjective, action, calm, quiet, strong)
42
hard(adjective, strong, tough, continue)
30
difficult(adjective, hard, evil, rough)
28
arduous(adjective, hard, rough, difficult)
27
knotty(adjective, hard, difficulty, difficult)
25
laborious(adjective, hard, rough, difficult)
24
harsh(adjective, strong, hard, smooth, tough)
23
burdensome(adjective, hard, rough, difficult)
21
operose(adjective, hard, difficult, violent)
20
cruel(adjective, strong, hard, tough)
19
disturbing(adjective, hard, difficult, unpleasant)
19
grievous(adjective, hard, tough, difficult)
19
hard-nosed(adjective, strong, hard, tough)
19
nasty(adjective, hard, rough, difficult)
18
uneven(adjective, mean, hard, smooth)
14
craggy(adjective, hard, smooth, sharp)
12
jagged(adjective, mean, hard, smooth)
10
coarse(adjective, hard, smooth, sharp)
10
rude(adjective, hard, rough, nasty)
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APASmart Define. (2015). rugged thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rugged/thesaurus/synonyms
ChicagoSmart Define. 2015. "rugged thesaurus" https://smartdefine.org/rugged/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, rugged thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rugged/thesaurus/synonyms>.
MLASmart Define. "rugged thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/rugged/thesaurus/synonyms>