501 entries under adjective topic. ×

54
tough(action, strong, hard, sound)
49
rough(action, calm, quiet, strong)
42
hard(strong, tough, severe, continue)
35
strong(hard, sound, tough, fit)
34
severe(strong, hard, tough, rough)
30
difficult(hard, severe, evil, rough)
28
arduous(hard, severe, rough, difficult)
27
knotty(hard, severe, difficulty, difficult)
26
hefty(hard, difficult, complex)
25
laborious(hard, severe, rough, difficult)
24
burly(hard, difficult, complex)
24
sturdy(strong, hard, sound, tough)
24
thorny(hard, difficulty, difficult, complex)
24
harsh(strong, hard, smooth, tough)
23
trying(hard, difficulty, difficult, complex)
23
burdensome(hard, severe, rough, difficult)
22
complicated(hard, difficulty, difficult, complex)
22
intricate(hard, difficulty, difficult, complex)
22
tricky(hard, difficult, delicate, uncertain)
22
complex(hard, difficult)
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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>