| authorisation |
| go-ahead(noun, authorization, consent) |
| licence(noun, authority, permit, permission, license) |
| ratification(noun, impression, impress, stamp) |
| stamp(noun, impression, impress) |
| express permission(noun, authority, permit, permission, license) |
| formal permission(noun, authority, permit, permission, license) |
| green light(noun, expression, authorization, consent, go-ahead) |
| leave(noun, agreement, authorization, consent, go-ahead) |
| rubber stamp(noun, expression, agreement, authorization, consent) |
| signet(noun, impression, impress, stamp) |
| validation |
| acknowledgment(noun, agreement, authorization, consent, warrant) |
| admission(noun, agreement, authorization, consent, go-ahead) |
| agreement(noun, authorization, consent, warrant, go-ahead) |
| certification |
| concurrence(noun, agreement, authorization, consent, go-ahead) |
| nihil obstat(expression, idiom) |
| sigil(impression, impress, stamp) |
| stamp of approval(expression, idiom, agreement, authorization, consent) |