wordbook vs dictionary

wordbook and dictionary both are nouns.

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

As nouns, dictionary is a hyponym of wordbook; that is, dictionary is a word with a more specific, narrower meaning than wordbook:

wordbook: a reference book containing words (usually with their meanings)
dictionary: a reference book containing an alphabetical list of words with information about them

Other hyponyms of wordbook include lexicon, onomasticon, vocabulary, gloss, glossary, synonym finder, thesaurus.

wordbook (noun)	dictionary (noun)
a reference book containing words (usually with their meanings)	a reference book containing an alphabetical list of words with information about them