Synonyms for vouch for

Most common

testify · attest · certify

All synonyms

Verb

Definitions

1. v. 1

   To affirm the truth or reliability of.

   Let him in. I’ll vouch for his good behaviour.

Example sentences

• testify Tom seems to be unwilling to testify against Mary.
• attest The fingerprints on the knife attest to her guilt.
• certify Records certify that Bob passed his driving test.

By length

6 letters

attest²

7 letters

testify³, certify³

The small number after each word is its number of syllables (attest² = 2 syllables).