61 entries under tough topic. ×

1
relentless(adjective, firm, cruel, determined)
1
reserved(adjective, firm, fixed, distant)
1
rigid(adjective, severe, firm, cruel)
1
self-willed(adjective, difficult, wild, determined)
1
standing pat(expression, adjective, firm, distant)
1
tenacious(adjective, difficult, wild, awkward)
1
tough-nut(adjective, hard, difficult, wild)
1
unbending(adjective, severe, cruel, pitiless)
1
uncooperative(adjective, difficult, wild, awkward)
1
undisciplined(adjective, difficult, wild, awkward)
1
unflexible(adjective, firm, distant, rigid)
1
ungovernable(adjective, difficult, wild, determined)
1
unmanageable(adjective, difficult, wild, awkward)
1
unpliable(adjective, difficult, wild, awkward)
1
unruly(adjective, difficult, wild, determined)
1
unswayable(adjective, firm, fixed, distant)
1
uptight(adjective, firm, fixed, distant)
1
wayward(adjective, difficult, wild, awkward)
1
willful(adjective, difficult, wild, determined)
0
levelheaded(adjective, hard, shrewd, stubborn)
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APASmart Define. (2013). locked in thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/locked_in/thesaurus/synonyms
ChicagoSmart Define. 2013. "locked in thesaurus" https://smartdefine.org/locked_in/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2013, locked in thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/locked_in/thesaurus/synonyms>.
MLASmart Define. "locked in thesaurus" 18 May 2013. Web. 30 September 2026. <https://smartdefine.org/locked_in/thesaurus/synonyms>