glossary vs wordbook

glossary and wordbook both are nouns.

Word	Noun	Adjective	Verb	Adverb
glossary	Yes	No	No	No
wordbook	Yes	No	No	No

As nouns, wordbook is a hypernym of glossary; that is, wordbook is a word with a broader meaning than glossary:

glossary: an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field
wordbook: a reference book containing words (usually with their meanings)

glossary (noun)	wordbook (noun)
an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field	a reference book containing words (usually with their meanings)