4
inculpable(adjective, good, clear, honest, pure)
4
letter-perfect(adjective, perfect)
4
moral(adjective, virtuous)
4
peerless(adjective, good, great, sound, excellent)
4
polished(adjective, clean, superb, best, expert)
4
precise(adjective, right, perfect, exact, proper)
4
rigorous(noun, exact, precise, accurate)
4
seamlessly
4
sharp(noun, exact, precise, accurate)
4
sound(adjective, good, great, reasonable, excellent)
4
superlative(adjective, excellent, perfect, pure, superb)
4
thorough(adjective, complete, total, perfect, full)
4
undiluted(adjective, pure)
4
unsoiled(adjective, clear, simple, bright, clean)
4
unspoiled(adjective, sound, perfect, pure, flawless)
4
white(adjective, clear, simple, bright, pure)
3
above reproach(expression, adjective, idiom, clean, perfect)
3
classic(adjective, having)
3
dead on(noun, exact, precise, accurate)
3
definite(noun, exact, precise, accurate)
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APASmart Define. (2016). faultless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/faultless/thesaurus/synonyms
ChicagoSmart Define. 2016. "faultless thesaurus" https://smartdefine.org/faultless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, faultless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/faultless/thesaurus/synonyms>.
MLASmart Define. "faultless thesaurus" 3 March 2016. Web. 21 September 2026. <https://smartdefine.org/faultless/thesaurus/synonyms>