171 entries under tough topic. ×

2
savage(adjective, hard, harsh, unpleasant)
2
square(adjective, severe, firm, harsh)
2
stiff-necked(adjective, strong, hard, severe)
2
thick(adjective, strong, hard, sturdy)
2
troublesome(adjective, hard, severe, rough)
2
unfeeling(adjective, severe, harsh, cruel)
2
unkind(adjective, harsh, grim, painful)
2
unsympathetic(adjective, severe, harsh, grim)
1
avaricious(adjective, hard, harsh, cruel)
1
backbreaking(adjective, hard, severe, rough)
1
barbarous(adjective, hard, harsh, cruel)
1
bloody(adjective, hard, harsh, cruel)
1
bullheaded(adjective, strong, hard, severe)
1
by the book(expression, adjective, idiom, strong, hard)
1
callous(adjective, hard, harsh, grim)
1
complicated(adjective, rough, difficult, heavy)
1
dead set(expression, adjective, severe, firm)
1
disagreeable(adjective, severe, harsh, unpleasant)
1
disciplinary(adjective, strong, hard, severe)
1
distressing(adjective, severe, rough, difficult)
10 years ago|17k views|share |citing 
APASmart Define. (2016). rigorous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>