144 entries under firm topic. ×

83
sure(adjective, good, set, clear, understanding)
47
positive(adjective, good, set, clear, strong)
44
definite(adjective, good, clear, strong, complete)
32
absolute(adjective, clear, strong, complete, correct)
31
confident(adjective, set, clear, strong, easy)
23
clear(adjective, complete, flat, total)
19
determined(adjective, good, strong, easy)
18
assured(adjective, clear, understanding, strong, easy)
17
dependable(adjective, good, clear, strong, sound)
17
fixed(adjective, change, clear, complete)
17
reliable(adjective, clear, strong, sound, easy)
17
unambiguous(adjective, clear, plain, perfect)
16
decided(adjective, clear, solid, perfect)
15
secure(verb, adjective, clear, sound)
14
convinced(adjective, set, clear, content)
14
true(adjective, good, strong, correct)
13
conclusive(adjective, clear, strong, correct, easy)
13
distinct(adjective, clear, correct, plain)
13
predestined(adjective, close, near, sure)
13
set(adjective, change, clear, solid)
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APASmart Define. (2016). certain thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/certain/thesaurus/synonyms
ChicagoSmart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, certain thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>.
MLASmart Define. "certain thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms>