twist bit vs twist drill

twist bit and twist drill both are nouns.

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

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

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