1. horny structure
2. unguis, fastener
3. fastening, holdfast, fixing, linear unit

1. attach
2. nail down, collar
3. apprehend, arrest, pick up, nab, cop, seize, prehend, clutch, smash
4. boom, blast, hit, nail down
5. peg, succeed, win, come through, bring home the bacon, deliver the goods, breeze through
6. ace, pass with flying colors, sweep through, sail through, pass, make it, pinpoint
7. locate, turn up, complete
7. play