From the Latin "bella" meaning "war":
* Rebellion: An act of violent or open resistance to an established government or ruler.
* Belligerent: Hostile and aggressive; eager or ready to fight.
* Bellicose: Having or showing a warlike attitude.
* Bellum: (Latin) War.
From the Latin "bellum" meaning "beautiful":
* Belle: A beautiful woman, especially a young one.
* Beautiful: Pleasing to the senses, especially to the sight; having beauty.
* Embellish: To make something more attractive or interesting by adding decorative details.
From the Old English "bellan" meaning "to bellow, roar, or shout":
* Bell: A hollow, usually metal object that makes a ringing sound when struck.
* Bellwether: A person or thing that leads or indicates a trend.
* Bellows: A device for producing a strong current of air, often used to fuel fires.
Other words with "bell":
* Belles-lettres: The fine arts of literature, especially imaginative writing.
* Bellhop: A hotel employee who carries luggage for guests.
* Bellbottom: A type of trousers with wide legs that flare out from the knee.
* Bell tower: A tower containing a bell.
Note: The root "bell" can also be found in many place names, such as "Bellevue" (meaning "beautiful view") and "Bellville" (meaning "town with a bell").