95 entries under strong topic. ×

2
unqualified(certain, definite, flawless, faultless)
2
unshaken(certain, definite, resolved, unalterable)
1
bitter(adjective, hard, tough, severe)
1
abiding(certain, definite, resolved, unalterable)
1
bound(adjective, flat, harsh, certain)
1
bullheaded(adjective, hard, tough, severe)
1
consistent(certain, definite, resolved, unalterable)
1
dead set on(expression, adjective, idiom, severe)
1
hang-tough(adjective, hard, tough, harsh)
1
hang tough(expression, certain, definite, resolved)
1
hardheaded(adjective, hard, tough, severe)
1
heavy(adjective, hard, tough, severe)
1
intent(certain, definite, resolved, unalterable)
1
stand pat(expression, firm, certain, definite)
0
dyed-in-the-wool(adjective, close, set, hard)
0
bent(certain, definite, resolved, unalterable)
0
ferric(adjective, hard, tough, sturdy)
0
ferrous(adjective, hard, tough, sturdy)
0
flat(certain, definite, resolved, unalterable)
0
frowning(adjective, hard, tough, severe)
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APASmart Define. (2015). strict thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>