Synonyms of thorough

Adjective

1. thorough, careful (vs. careless)

usage: painstakingly careful and accurate; "our accountant is thorough"; "thorough research"

2. exhaustive, thorough, thoroughgoing, complete (vs. incomplete)

usage: performed comprehensively and completely; "an exhaustive study"; "made a thorough search"; "thoroughgoing research"

Definition and meaning of thorough (Dictionary)