appendix vs caecum

appendix and caecum both are nouns.

Word	Noun	Adjective	Verb	Adverb
appendix	Yes	No	No	No
caecum	Yes	No	No	No

appendix (noun)	caecum (noun)
a vestigial process that extends from the lower end of the cecum and that resembles a small pouch	the cavity in which the large intestine begins and into which the ileum opens
supplementary material that is collected and appended at the back of a book