1. lights-out
2. bugle call, pat
3. rap, tap, sound, water faucet
4. water tap, tap, spigot, hydrant, faucet, plumbing fixture, rap
5. strike, tap, bump, blow, tap
6. plate, tap
7. tool, tap
8. spigot, plug, stopper, stopple, wiretap
9. tap, investigation, investigating, tap
9. pat, dab, touch, touching