Synonyms|285Antonyms|5|Broader|0Narrower|0Related|6

217 entries under adjective topic. ×

1
indubitable(clear, certain, definite, positive)
1
inexorable(intense, resolute, persistent, rigid)
1
infallible(certain, flawless, reliable, trustworthy)
1
infernal(complete, total, definite, absolute)
1
inflexible(strong, flat, certain, determined)
1
intense(firm, solid, steady, stable)
1
intent(strong, flat, certain, determined)
1
inveterate(certain, limited, definite, inflexible)
1
level(certain, limited, definite, inflexible)
1
levelheaded(firm, solid, stable, fixed)
1
limited(certain, definite, inflexible, restricted)
1
loyal(firm, solid, intense, certain)
1
narrow(certain, limited, definite, inflexible)
1
no catch(expression, complete, total, definite)
1
no ifs ands or buts(expression, idiom, complete, total)
1
obdurate(strong, flat, intense, certain)
1
perfect(complete, total, definite, safe)
1
persevering(set, strong, flat, firm)
1
persistent(strong, flat, certain, determined)
1
persuaded(clear, certain, definite, positive)
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ChicagoSmart Define. 2015. "never-failing thesaurus" https://smartdefine.org/never-failing/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, never-failing thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/never-failing/thesaurus/synonyms>.
MLASmart Define. "never-failing thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/never-failing/thesaurus/synonyms>