100 entries under sturdy topic. ×

1
insensible(adjective, dull, quiet, strong, hard)
1
obdurate(adjective, strong, hard, tough, severe)
1
reinforced(adjective, strong, sound, tough, solid)
1
relentless(adjective, strong, hard, tough, severe)
1
rigid(adjective, strong, hard, tough, severe)
1
secure(adjective, strong, hard, sound, tough)
1
sinewy(adjective, strong, sound, tough, solid)
1
stark(adjective, strong, sound, tough, solid)
1
staunch(adjective, strong, sound, tough, solid)
1
strict(adjective, strong, hard, tough, severe)
1
unbending(adjective, strong, hard, tough, severe)
1
unsparing(adjective, strong, hard, tough, severe)
0
adamant(adjective, strong, hard, tough)
0
astringent(adjective, strong, hard, tough, severe)
0
authoritarian(adjective, strong, hard, tough)
0
bullheaded(adjective, strong, hard, tough)
0
by the book(expression, adjective, idiom, strong, hard)
0
disciplinary(adjective, strong, hard, tough)
0
dyed-in-the-wool(adjective, strong, hard, tough)
0
ferric(adjective, strong, hard, tough)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 27 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>