Antonyms of adj errorless

1 sense of errorless

Sense 1
errorless -- (free from error; "an errorless baseball game")

INDIRECT (VIA perfect) -> imperfect -- (not perfect; defective or inadequate; "had only an imperfect understanding of his responsibilities"; "imperfect mortals"; "drainage here is imperfect")

Similarity of adj errorless

1 sense of errorless

Sense 1
errorless -- (free from error; "an errorless baseball game")
       => perfect (vs. imperfect) -- (being complete of its kind and without defect or blemish; "a perfect circle"; "a perfect reproduction"; "perfect happiness"; "perfect manners"; "a perfect specimen"; "a perfect day")

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