Synonyms|862Antonyms|116|Broader|10Narrower|8Related|256

73 entries under substantial topic. ×

42
firm(noun, adjective, clear, strong, sound)
28
unyielding(adjective, clear, strong, sound, tough)
16
set(adjective, strong, secure, flat, firm)
16
staunch(adjective, clear, strong, sound, tough)
13
fixed(adjective, strong, sound, secure, tough)
13
strong(adjective, sound, secure, tough, fit)
11
stalwart(adjective, strong, sound, tough, fit)
10
immovable(adjective, strong, secure, firm, solid)
10
sturdy(adjective, strong, sound, tough, fit)
9
fast(adjective, strong, free, secure, tough)
8
stout(adjective, strong, sound, tough, fit)
8
vigorous(adjective, strong, sound, tough, fit)
7
enduring(adjective, strong, sound, tough, fit)
7
hearty(adjective, strong, sound, tough, fit)
7
secure(adjective, strong, sound, free, tough)
7
steady(adjective, strong, sound, secure, tough)
7
tight(adjective, close, strong, hard, free)
6
durable(adjective, strong, sound, secure, tough)
6
hardy(adjective, strong, sound, tough, solid)
5
energetic(adjective, strong, sound, tough, solid)
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 22 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>