1. confident (vs. diffident), assured, cocksure, overconfident, positive, reassured, self-assured, self-confident

usage: having or marked by confidence or assurance; "a confident speaker"; "a confident reply"; "his manner is more confident these days"; "confident of fulfillment"

2. convinced(predicate), positive(predicate), confident(predicate), certain(predicate) (vs. uncertain), sure (vs. unsure)

usage: persuaded of; very sure; "were convinced that it would be to their advantage to join"; "I am positive he is lying"; "was confident he would win"

3. confident, surefooted, sure-footed, capable (vs. incapable)

usage: not liable to error in judgment or action; "most surefooted of the statesmen who dealt with the depression"- Walter Lippman; "demonstrates a surefooted storytelling talent"- Michiko Kakutani

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