List 3
Across 
5. One side short of a square.
8. Three of a kind.
10. An arch is this.
11. 1000 million.
12. Able to speak two languages.
13. College.
15. Believable.
17. What you might call a three-legged dog.
18. Strong than a comma, not quite a period.
20. Togetherness.
21. Gullible.
24. Blow up.
25. One of a kind.
27. Not quite a home run.
Down 
1. Every two months.
2. Huge.
3. False front.
4. One step before the championship.
5. Three siblings with the same birthday.
6. Sort of like twin telescopes.
7. Bad feeling.
9. Every six months.
12. It lets you bend your arm.
13. The home of everything.
14. It also means sarcastic.
16. Two-wheeler.
19. Watch.
20. Bring together.
22. Escape from.
23. All together.
26. Bring together.