Synonyms|1kAntonyms|253|Broader|5Narrower|1Related|546

189 entries under severe topic. ×

1
piquant
1
potent(adjective, stringent, drastic)
1
powerful(adjective, harsh, rigid, tight)
1
serious(adjective, strong, hard, tough)
1
set(adjective, hard, tough, firm)
1
spare
1
stark
1
stickling(adjective, tough, firm, harsh)
1
straight(adjective, tough, correct, firm)
1
stuffy(adjective, tough, firm, harsh)
1
tiring(adjective, hard, tough, rough)
1
towering(adjective, stringent, drastic)
1
unforgiving(adjective, hard, tough, harsh)
1
unpermissive(adjective, hard, tough, rough)
1
unpleasant(adjective, tough, harsh, cruel)
1
uptight(adjective, tough, firm, harsh)
1
vigorous(adjective, complete, thorough, comprehensive)
0
coldblooded(grim, bleak)
0
galling(adjective, harsh, unpleasant, heavy)
0
hard as nails(expression, adjective, idiom, tough)
For more, visit Rigorous on Power Thesaurus
10 years ago|17k views|share |citing 
APASmart Define. (2016). rigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>