ileus vs intestinal obstruction

ileus and intestinal obstruction both are nouns.

Word	Noun	Adjective	Verb	Adverb
ileus	Yes	No	No	No
intestinal obstruction	Yes	No	No	No

As nouns, ileus and intestinal obstruction are synonyms defined as:

ileus and intestinal obstruction: blockage of the intestine (especially the ileum) that prevents the contents of the intestine from passing to the lower bowel

ileus (noun)	intestinal obstruction (noun)
blockage of the intestine (especially the ileum) that prevents the contents of the intestine from passing to the lower bowel	blockage of the intestine (especially the ileum) that prevents the contents of the intestine from passing to the lower bowel