100 entries under solid topic. ×

1
invariable(calm, strong, steady, substantial)
1
locked on(expression, adjective, strong, easy)
1
mighty(adjective, strong, great, sound, tough)
1
muscular(adjective, strong, sound, tough)
1
nailed(calm, strong, secure, steady)
1
nailed down(expression, adjective, strong, easy)
1
on ice(expression, adjective, strong, easy)
1
perdurable(calm, strong, steady, substantial)
1
permanent(calm, strong, steady, substantial)
1
poised(calm, strong, steady, substantial)
1
reassured(adjective, strong, easy, certain)
1
reinforced(adjective, strong, sound, tough)
1
resolute(adjective, calm, strong, secure, easy)
1
robust(adjective, strong, sound, secure, tough)
1
sanguine(adjective, strong, easy, certain)
1
self-assured(adjective, strong, easy, certain)
1
self-confident(adjective, strong, easy, certain)
1
shoo-in(adjective, strong, easy, certain)
1
sinewy(adjective, strong, sound, tough)
1
stabile(calm, strong, steady, substantial)
10 years ago|5.4k views|share |citing 
APASmart Define. (2016). well-founded thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/well-founded/thesaurus/synonyms
ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>