Synonyms|359Antonyms|67|Broader|1Narrower|0Related|355
1
imprinted
1
in fine feather(expression, adjective, idiom, strong, sound)
1
in the bag(expression, adjective, idiom, strong, easy)
1
incontestable
1
incontrovertible
1
indisputable
1
infixed
1
informed
1
ingrained
1
ingrown
1
invariable(calm, strong, solid, steady, substantial)
1
inveterate
1
invincible
1
irrefutable(sound, reasonable, rational, absolute, indisputable)
1
kick-ass
1
legit(adjective, good, sound, right, reasonable)
1
locked on(expression, adjective, strong, easy, solid)
1
long-established
1
long-standing(adjective, steady, even, unchanging)
1
massive
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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>