73 entries under substantial topic. ×

1
healthy(adjective, strong, hard, sound, tough)
1
heavy-duty(adjective, strong, sound, tough, solid)
1
immobile(strong, secure, stable, rigid)
1
in fine feather(expression, adjective, idiom, strong, sound)
1
mighty(adjective, strong, hard, sound, tough)
1
muscular(adjective, strong, sound, tough, fit)
1
nailed(adjective, strong, secure, solid, steady)
1
reinforced(adjective, strong, sound, tough, solid)
1
rooted(strong, secure, stable, rigid)
1
stark(adjective, strong, sound, tough, solid)
1
strapping(adjective, strong, hard, sound, tough)
1
taut(strong, secure, stable, unmoving)
1
tightened(strong, secure, stable, unmoving)
1
unmoving(adjective, strong, secure, stable)
1
well-built(adjective, strong, sound, tough, solid)
1
well-founded(adjective, strong, sound, secure, tough)
1
well-made(adjective, strong, sound, tough, solid)
0
bolted(strong, secure, stable, unmoving)
0
braced(strong, secure, stable, unmoving)
0
cemented(strong, secure, stable, unmoving)
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 24 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>