50 entries under stubborn topic. ×

2
wayward(difficult, awkward, persistent, obstinate)
1
awkward(tough, difficult, wild, obstinate)
1
bullheaded(adjective, strong, hard, tough, severe)
1
difficult(tough, wild, awkward, obstinate)
1
hang tough(expression, tough, difficult, wild, awkward)
1
hard-core(adjective, strong, hard, tough, severe)
1
headstrong(adjective, hard, tough, severe, rough)
1
immovable(adjective, strong, hard, tough, difficult)
1
incompliant(tough, severe, difficult, wild, awkward)
1
incurable(tough, difficult, wild, awkward, obstinate)
1
indocile(tough, difficult, wild, awkward, obstinate)
1
insoluble(tough, difficult, wild, awkward, obstinate)
1
intransigent(severe, determined, hostile, stiff, inflexible)
1
locked(determined, obstinate, willful)
1
locked in(expression, tough, severe, difficult, stiff)
1
mulish(adjective, strong, hard, tough, severe)
1
pat(tough, difficult, wild, awkward, obstinate)
1
pertinacious(tough, firm, difficult, determined, awkward)
1
perverse(tough, difficult, awkward, obstinate)
1
pigheaded(tough, firm, difficult, determined, awkward)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>