Noun
1. agreement
2. acceptance
3. approval
4. approbation
5. consent
6. acquiescence
7. compliance
8. concurrence
9. sanction
10. endorsement
11. confirmation
12. permission
13. leave
14. blessing
15. the go-ahead
16. the nod
17. the green light
19. the thumbs up
Verb
20. agree to
21. accept
22. approve
23. consent to
24. acquiesce in
25. concur in
26. give one's blessing to
27. sanction
28. endorse
29. confirm
30. give the go-ahead to
31. give the nod to
32. give the green light to
34. OK
36. accede to