| welcome(noun, verb, stop, meet, honor) |
| OK(noun, act, accept, informal, process) |
| accede(verb, agree, respond, assent) |
| accord(noun, agreement, arrangement, approval, choice) |
| accost(verb, stop, meet, honor, acknowledge) |
| acknowledgment(noun, understanding, agreement, welcome, contract) |
| affirmation(noun, agreement, signal, authorization, proof) |
| affirmative(noun, signal, permission, gesture) |
| agreement(noun, act, accept, process, arrangement) |
| bidding(noun, command) |
| clue(mark, light, sign, hint, suggestion) |
| duck(verb, move, bend, bow, dip) |
| flap(noun, verb, shake, alert, swing) |
| green light(noun, expression, support, sign, approval) |
| hang(verb, swing, hang, dangle, droop) |
| hint(light, sign, prompt, suggestion, indication) |
| hug(verb, greet) |
| nudge(verb, indicate, indication) |
| obeisance(noun, courtesy, inclination, bow, greeting) |
| recognize(verb, move, stop, meet, honor) |