daybook vs journal

daybook and journal both are nouns.

Word	Noun	Adjective	Verb	Adverb
daybook	Yes	No	No	No
journal	Yes	No	No	No

As nouns, journal is a hypernym of daybook; that is, journal is a word with a broader meaning than daybook:

As nouns, daybook and journal are synonyms defined as:

daybook and journal: a ledger in which transactions have been recorded as they occurred

daybook (noun)	journal (noun)
an accounting journal as a physical object	the part of the axle contained by a bearing
a ledger in which transactions have been recorded as they occurred	a record book as a physical object
	a periodical dedicated to a particular subject
	a daily written record of (usually personal) experiences and observations
	a ledger in which transactions have been recorded as they occurred