enchiridion vs reference book

enchiridion and reference book both are nouns.

Word	Noun	Adjective	Verb	Adverb
enchiridion	Yes	No	No	No
reference book	Yes	No	No	No

As nouns, reference book is a hypernym of enchiridion; that is, reference book is a word with a broader meaning than enchiridion:

enchiridion: a concise reference book providing specific information about a subject or location
reference book: a book to which you can refer for authoritative facts

Other hypernyms of enchiridion include book of facts, reference, reference work.

enchiridion (noun)	reference book (noun)
a concise reference book providing specific information about a subject or location	a book to which you can refer for authoritative facts