serial
(a story that is broadcast in several parts)
- A new serial is starting on television at 8:30 tonight.
(happening or arranged in a series)
- Keep the images in the same serial order.
cereal
(a plant grown to produce grain such as oats, wheat, rice, etc.)
- Wheat and rice are the two most important cereal crops.
(a food made from roasted grain eaten with milk in the morning)
- I have a large bowl of cereal for breakfast every morning.