attorney vs barrister

attorney and barrister both are nouns.

Word	Noun	Adjective	Verb	Adverb
attorney	Yes	No	No	No
barrister	Yes	No	No	No

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

attorney: a professional person authorized to practice law; conducts lawsuits or gives legal advice
barrister: a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution

attorney (noun)	barrister (noun)
a professional person authorized to practice law; conducts lawsuits or gives legal advice	a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution