• 証明しょうめい — proof
• 証拠しょうこ — evidence
• 証言しょうげん — testimony
• 検証けんしょう — verification
• 保証ほしょう — guarantee
• 証人しょうにん — witness
• 証書しょうしょ — certificate
• 証券しょうけん — securities (stocks, bonds)

証 includes the 言 (speech) radical and phonetic component 正 (correct), suggesting the act of speaking clearly to prove something. Often used in legal, official, and factual contexts.

証拠しょうこが 見みつかりました。
Evidence was found.

それは 彼かれの証言しょうげんに 矛盾むじゅんしています。
That contradicts his testimony.

“しょう” is used across many compound words. For example, 証明 (proof) or 証拠 (evidence) are common in legal or logical settings.