拠点【きょてん】
position, location, base, point, site
根拠【こんきょ】
basis, grounds, foundation, reason, authority, base (of operations)
証拠【しょうこ】
evidence, proof
論拠【ろんきょ】
grounds of an argument
準拠【じゅんきょ】
basis, based on, conformance, conformity, authority (of), standard, reference