Titus 1:9 links sound doctrine to refuting opponents — the same purpose of silencing critics seen in Titus 2:8.

In 1 Peter 3:16, a good conscience makes revilers ashamed — directly parallel to the aim of sound speech here.

In 1 Peter 2:15, doing good silences ignorant critics — same goal of blameless conduct to shame opponents.

1 Peter 2:12 links good works observed by opponents to glorifying God—a direct parallel to silencing reproach here.

In Philippians 2:14-16, blameless conduct shines among a crooked generation — same call to be above reproach to silence critics.

1 Timothy 5:14 directly says 'give no opportunity to the adversary to speak reproachfully'—the same aim as here.

2 Peter 2:2 warns that false teachers bring the way of truth into disrepute — the opposite outcome of the blameless conduct urged in Titus 2:8.

1 Timothy 6:1 warns against behavior that causes God's name to be slandered — same concern for reputation underlying Titus 2:8.

1 Timothy 3:7 applies the same requirement of a good reputation with outsiders to church leaders — mirroring Titus 2:8's concern.

1 Thessalonians 4:12 similarly urges conduct that earns outsiders' respect — the same goal of blameless witness from Titus 2:8.

1 Thessalonians 2:10 describes blameless conduct before believers—parallel to Titus 2:8's standard of having nothing bad said by outsiders.

Romans 2:24 says God's name is blasphemed because of believers' bad behavior—contrast to Titus 2:8 where good speech silences opponents.

Daniel 6:4 shows Daniel having no fault found by enemies—mirroring Titus 2:8's aim that opponents find nothing bad to say.

1 Timothy 6:3 describes those who reject wholesome words—the opposite of the sound speech that silences opponents here.

2 Timothy 1:13 emphasizes retaining the pattern of sound teaching — related to the 'sound speech' in Titus 2:8, but more about doctrine content.

In Nehemiah 6:13, enemies try to give him a bad name — opposite scenario: Titus aims to prevent exactly that.

Nehemiah 5:9 seeks to avoid reproach from enemies—parallel to the goal of giving opponents nothing evil to say.