| green light(expression, sanction, consent, proof, permission) |
| grounds(noun, information, reason, statement, picture) |
| halt |
| illustration(noun, statement, evidence, declaration) |
| imprimatur(agreement, authorization, consent, warrant, go-ahead) |
| indulgence(agreement, authorization, consent, go-ahead) |
| information(noun, reason, statement, picture, evidence) |
| kiteflying |
| letting(agreement, authorization, consent, warrant, go-ahead) |
| liberty(agreement, authorization, consent, go-ahead) |
| license(agreement, authorization, consent, warrant, go-ahead) |
| lick(noun, check, approval, examination, standard) |
| litmus test(expression, idiom, experiment) |
| lowdown(noun, information, reason, picture, evidence) |
| okay(agreement, sanction, authorization, consent, proof) |
| paper trail(noun, expression, information, reason, picture) |
| permit(agreement, authorization, consent, go-ahead) |
| pledge(noun, affirmation) |
| pop quiz(noun, expression, check, approval, examination) |
| preliminary(noun, check, approval, examination, standard) |