Synonyms|89Antonyms|12|Broader|0Narrower|1Related|71
1
purely
1
reliably
1
rightly
1
safely
1
securely
1
thoroughly
1
to be sure(expression, idiom, adverb, absolutely, certainly)
1
totally
1
trustworthily
1
undoubtedly(adverb, absolutely, certainly, clearly, perfectly)
1
unequivocally(adverb, absolutely, certainly, clearly, definitely)
1
unmistakably(adverb, absolutely, certainly, clearly, definitely)
1
unquestionably(adverb, absolutely, certainly, clearly, perfectly)
1
wholly
1
without fail(expression, adverb, absolutely, certainly, clearly)
0
apodictically
0
assertively
0
assuredly
0
be sure(clearly, definitely, plainly, indeed)
0
clearly
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APASmart Define. (2015). infallibly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/infallibly/thesaurus/synonyms
ChicagoSmart Define. 2015. "infallibly thesaurus" https://smartdefine.org/infallibly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, infallibly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/infallibly/thesaurus/synonyms>.
MLASmart Define. "infallibly thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/infallibly/thesaurus/synonyms>