Synonyms of faultless in English:

faultless


See US English definition of faultless

See UK English definition of faultless

See Spanish definition of impecable

adjective

1‘he replied in faultless English’

SYNONYMS
perfect, flawless, without fault, error-free, without blemish, unblemished, impeccable, accurate, precise, exact, correct, unerring
exemplary, model, ideal, copybook, scrupulous, meticulous, just so
British informal spot on, bang on, on the mark, on the nail, on the button
ANTONYMS

flawed, faulty

2‘the wife of the prisoner was faultless’

SYNONYMS
guiltless, without guilt, innocent, blameless, above reproach, irreproachable, sinless, pure, unsullied
ANTONYMS

guilty