ris·er 
(rīzər)
(rīzər)n.
1. One who rises, especially from sleep: a late riser.
2. The vertical part of a stair step.
3. A platform, as for elevating a group of people above a crowd, often arranged with similar platforms in tiers.
- choric
- chorine
- chorioallantoic
- chorioallantois
- choriocarcinoma
- chorioid
- chorioid
- chorion
- chorionic
- chorionic villus
- chorionic villus sampling
- choripetalous
- chorister
- chorizo
- C horizon
- Chornobyl'
- Chornobyl'
- chorographer
- chorographic
- chorographical
- chorographically
- chorography
- choroid
- chortle
- chortler