voucher

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a negotiable certificate that can be detached and redeemed as needed
• Syn:
coupon
• Hypernyms:
commercial document, commercial instrument
• Hyponyms:
book token, meal ticket, luncheon voucher, twofer
2. someone who vouches for another or for the correctness of a statement
• Syn:
verifier
• Derivationally related forms:
verify (for: verifier), vouch
• Hypernyms:
supporter, protagonist, champion, admirer, booster, friend
3. a document that serves as evidence of some expenditure
• Hypernyms:
document, written document, papers

• Từ đồng nghĩa / Synonyms:
  coupon, verifier