Bowels and Bowel

Bowels noun - The center of the Earth.

Bowel is a synonym for bowels. In some cases you can use "Bowel" instead a noun "Bowels".

Bowel noun - The part of the alimentary canal between the stomach and the anus.

Bowels is a synonym for bowel. Sometimes you can replace term "Bowels" with "Bowel", this nouns are similar.