double entry vs bookkeeping

double entry and bookkeeping both are nouns.

Word	Noun	Adjective	Verb	Adverb
double entry	Yes	No	No	No
bookkeeping	Yes	No	No	No

As nouns, bookkeeping is a hypernym of double entry; that is, bookkeeping is a word with a broader meaning than double entry:

double entry: bookkeeper debits the transaction to one account and credits it to another
bookkeeping: the activity of recording business transactions

Other hypernyms of double entry include clerking.

double entry (noun)	bookkeeping (noun)
bookkeeper debits the transaction to one account and credits it to another	the activity of recording business transactions