| strong(adjective, solid, stable, sure, safe) | |
| tenacious(adjective, strong, secure, solid, steady) | |
| truehearted | |
| tufted | |
| turned off(verb, phrasal verb) | |
| unbending(determined, rigid, inflexible, obstinate, stubborn) | |
| uncompromising(adjective, obstinate, stubborn, willful) | |
| wisped | |
| betrothed | |
| accessed | |
| adjusted(adjective, strong, solid, stable, sure) | |
| arrested | |
| awkward(obstinate, stubborn, willful) | |
| berthed | |
| break open(verb, expression, open, divide, pick) | |
| breeched | |
| bull-headed(obstinate, stubborn, willful, fractious, intransigent) | |
| buttoned down(expression, adjective, strong, solid, stable) | |
| buttoned up(verb, phrasal verb) | |
| cantankerous(obstinate, stubborn, willful) |
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| APA | Smart Define. (2013). locked thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/locked/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "locked thesaurus" https://smartdefine.org/locked/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2013, locked thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/locked/thesaurus/synonyms>. |
| MLA | Smart Define. "locked thesaurus" 27 June 2013. Web. 25 September 2026. <https://smartdefine.org/locked/thesaurus/synonyms> |