| Answer | Crossword Clue |
|---|---|
| TONGUEANDGROOVE | Kind of joint between boards |
| KNEE | Joint between the thigh and shin |
| KNEE | Joint between the ankle and hip |
| KNEE | Joint between the hip and ankle |
| NORAD | Joint military venture between the U.S. and Canada |
| NATO | Alliance whose joint exercise resulted in tension between Greece and Turkey |
