codex vs manuscript

codex and manuscript both are nouns.

Word	Noun	Adjective	Verb	Adverb
codex	Yes	No	No	No
manuscript	Yes	No	No	No

As nouns, manuscript is a hypernym of codex; that is, manuscript is a word with a broader meaning than codex:

codex: an unbound manuscript of some ancient classic (as distinguished from a scroll)
manuscript: handwritten book or document

Other hypernyms of codex include holograph.

codex (noun)	manuscript (noun)
an unbound manuscript of some ancient classic (as distinguished from a scroll)	the form of a literary work submitted for publication
an official list of chemicals or medicines etc.	handwritten book or document