bowel vs intestine

bowel and intestine both are nouns.

Word	Noun	Adjective	Verb	Adverb
bowel	Yes	No	No	No
intestine	Yes	No	No	No

As nouns, bowel and intestine are synonyms defined as:

bowel and intestine: the part of the alimentary canal between the stomach and the anus

Other synonyms of bowel include gut.

bowel (noun)	intestine (noun)
the part of the alimentary canal between the stomach and the anus	the part of the alimentary canal between the stomach and the anus