accountancy vs line of work

accountancy and line of work both are nouns.

Word	Noun	Adjective	Verb	Adverb
accountancy	Yes	No	No	No
line of work	Yes	No	No	No

As nouns, line of work is a hypernym of accountancy; that is, line of work is a word with a broader meaning than accountancy:

accountancy: the occupation of maintaining and auditing records and preparing financial reports for a business
line of work: the principal activity in your life that you do to earn money

Other hypernyms of accountancy include business, job, line, occupation.

accountancy (noun)	line of work (noun)
the occupation of maintaining and auditing records and preparing financial reports for a business	the principal activity in your life that you do to earn money