Synonyms|178Antonyms|32|Broader|2Narrower|0Related|7

121 entries under adjective topic. ×

1
hidebound(persistent, obstinate, insistent, dogged)
1
immovable(strong, hard, tough, difficult)
1
implacable(strong, hard, tough, severe)
1
insubordinate(persistent, obstinate, insistent, dogged)
1
insurgent(persistent, obstinate, insistent, dogged)
1
inveterate(persistent, obstinate, insistent, dogged)
1
invincible(persistent, obstinate, insistent, dogged)
1
iron(persistent, obstinate, insistent, dogged)
1
irreconcilable(hostile, conflicting)
1
mortified(strong, hard, tough, severe)
1
mulish(strong, hard, tough, severe)
1
mutinous(persistent, obstinate, insistent, dogged)
1
obsessive(persistent, obstinate, insistent, dogged)
1
persistent(obstinate, insistent, dogged)
1
resolved(persistent, obstinate, insistent, dogged)
1
rigorous(strong, hard, tough, severe)
1
rough(strong, hard, tough, harsh)
1
serious(strong, hard, tough, severe)
1
set(persistent, obstinate, insistent, dogged)
1
single-minded(persistent, obstinate, insistent, dogged)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>