drill vs bit

drill and bit both are nouns.

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

drill (noun)	bit (noun)
systematic training by multiple repetitions	the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press
(military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms	piece of metal held in horse's mouth by reins and used to control the horse while riding
similar to the mandrill but smaller and less brightly colored	the part of a key that enters a lock and lifts the tumblers
a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)	a short performance that is part of a longer program
	a small fragment
	an instance of some kind
	a small amount of solid food; a mouthful
	a small fragment of something broken off from the whole
	a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states
	a small piece or quantity of something
	an indefinitely short time

drill (verb)	bit (verb)
learn by repetition
teach by repetition
train in the military, e.g., in the use of weapons
undergo military training or do military exercises
make a hole, especially with a pointed power or hand tool