证明 [ zhèng míng ]: proof; certificate; identification; testimonial; Classifiers: 个 ; to prove; to testify; to confirm the truth of

保证 [ bǎo zhèng ]: guarantee; to guarantee; to ensure; to safeguard; to pledge; Classifiers: 个

证据 [ zhèng jù ]: evidence; proof; testimony

证实 [ zhèng shí ]: to confirm (sth to be true); to verify

证券 [ zhèng quàn ]: negotiable security (financial); certificate; stocks and bonds

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