drill bit vs blade bit

drill bit and blade bit both are nouns.

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

As nouns, blade bit is a hyponym of drill bit; that is, blade bit is a word with a more specific, narrower meaning than drill bit:

Other hyponyms of drill bit include core bit, fishtail bit, rock bit, roller bit.

drill bit (noun)	blade bit (noun)
a bit used in drilling for oil	a drilling bit with cutting edges usually hardened against wear