twist drill vs twist bit

twist drill and twist bit both are nouns.

Word	Noun	Adjective	Verb	Adverb
twist drill	Yes	No	No	No
twist bit	Yes	No	No	No

As nouns, twist drill and twist bit are synonyms defined as:

twist drill (noun)	twist bit (noun)
a bit or drill having deep helical grooves	a bit or drill having deep helical grooves