1. conscientious, painstaking, scrupulous, careful (vs. careless)

usage: characterized by extreme care and great effort; "conscientious application to the work at hand"; "painstaking research"; "scrupulous attention to details"

2. conscientious (vs. unconscientious)

usage: guided by or in accordance with conscience or sense of right and wrong; "a conscientious decision to speak out about injustice"

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See also: conscientious (Dictionary)