sub·tle·ty 
(sŭtl-tē)
(sŭtl-tē)n. pl. sub·tle·ties
1. The quality or state of being subtle.
2. Something subtle, especially a nicety of thought or a fine distinction.
- redia
- redial
- redid
- redifferentiation
- redingote
- red ink
- redintegration
- redintegrative
- redintegrator
- redirect
- redirect examination
- redirection
- rediscover
- rediscovery
- redistribute
- redistribution
- redistributionist
- redistributive
- redistrict
- redivivus
- Red Jacket
- red kidney bean
- red king crab
- red knot
- red lead