register vs accounting

register and accounting both are nouns.

Word	Noun	Adjective	Verb	Adverb
register	Yes	No	Yes	No
accounting	Yes	No	No	No

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

register: a book in which names and transactions are listed
accounting: a bookkeeper's chronological list of related debits and credits of a business; forms part of a ledger of accounts

Other hyponyms of register include accounting system, method of accounting, inventory, payroll, paysheet.

register (noun)	accounting (noun)
a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device	the occupation of maintaining and auditing records and preparing financial reports for a business
an air passage (usually in the floor or a wall of a room) for admitting or excluding heated air from the room	a system that provides quantitative information about finances
a cashbox with an adding machine to register transactions; used in shops to add up the bill	a convincing explanation that reveals basic causes
(computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind	a statement of recent transactions and the resulting balance
(music) the timbre that is characteristic of a certain range and manner of production of the human voice or of different pipe organ stops or of different musical instruments	a bookkeeper's chronological list of related debits and credits of a business; forms part of a ledger of accounts
an official written record of names or events or transactions
a book in which names and transactions are listed

register (verb)	accounting (verb)
enter into someone's consciousness
indicate a certain reading; of gauges and instruments
record in a public office or in a court of law
send by registered mail
manipulate the registers of an organ
be aware of
show in one's face
record in writing; enter into a book of names or events or transactions
enroll to vote
have one's name listed as a candidate for several parties