88 entries under insistent topic. ×

8
undeviating(adjective, strong, flat, honest, harsh)
7
grim(adjective, strong, hard, tough, severe)
7
determined(adjective, strong, flat, harsh, certain)
7
pitiless(adjective, severe, harsh, cruel, determined)
6
adamant(adjective, strong, hard, tough, flat)
6
obstinate(adjective, hard, tough, moderate, severe)
6
ruthless(adjective, hard, rough, harsh, cruel)
6
steadfast(adjective, close, strong, correct, flat)
5
narrow-minded(adjective, persistent, obstinate, dogged)
5
single-minded(adjective, tough, firm, harsh, cruel)
5
unrelenting(adjective, strong, hard, tough, severe)
4
confirmed(adjective, hard, rough, harsh, proper)
4
hard-line(adjective, strong, hard, tough, severe)
4
intractable(adjective, hard, persistent, rigid, obstinate)
4
resolved(adjective, definite, persistent, rigid, obstinate)
4
tenacious(adjective, persistent, obstinate, dogged)
4
unflinching(adjective, strong, flat, harsh, certain)
3
hard-shell(adjective, strong, hard, tough, severe)
3
hard-shelled(adjective, hard, tough, severe, rough)
3
indomitable(adjective, strong, hard, tough, resolute)
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APASmart Define. (2015). strict thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 22 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>