6
faithful(noun, adjective, exact, precise, accurate)
6
finished(adjective, good, great, sound, excellent)
6
foolproof(adjective, perfect, pure, splendid, flawless)
6
matchless(adjective, good, great, excellent, perfect)
6
righteous(adjective, good, clear, honest, exact)
6
uncorrupted(adjective, virtuous)
6
unerring(adjective, correct, perfect, true, flawless)
6
unflawed(adjective, good, perfect, flawless, textbook)
5
indefectible(adjective, good, pure, splendid, flawless)
5
infallible(adjective, dependable, unerring)
5
lily-white(adjective, right, innocent, exemplary)
5
not guilty(expression, adjective, idiom, good, clear)
5
proper(adjective, right, perfect, exact, true)
5
superb(adjective, good, great, sound, excellent)
5
taintless(adjective, clear, simple, bright, clean)
5
true(noun, adjective, exact, precise, accurate)
5
unalloyed(adjective, pure, flawless, textbook)
5
unmixed(adjective, flawless, textbook)
4
angelic(adjective, pure)
4
decent(adjective, clean, honest, perfect, pure)
10 years ago|14k views|share |citing 
APASmart Define. (2016). faultless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/faultless/thesaurus/synonyms
ChicagoSmart Define. 2016. "faultless thesaurus" https://smartdefine.org/faultless/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, faultless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/faultless/thesaurus/synonyms>.
MLASmart Define. "faultless thesaurus" 3 March 2016. Web. 20 September 2026. <https://smartdefine.org/faultless/thesaurus/synonyms>