drum vs drum brake

drum and drum brake both are nouns.

Word	Noun	Adjective	Verb	Adverb
drum	Yes	No	Yes	No
drum brake	Yes	No	No	No

drum (noun)	drum brake (noun)
small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise	hydraulic brake in which friction is applied to the inside of a spinning drum by the brake shoe
a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end
a cylindrical metal container, commonly used for shipping or storage of liquids
a hollow cast iron cylinder attached to the wheel that forms part of the brakes
the sound of a drum
a bulging cylindrical shape; hollow with flat ends

drum (verb)	drum brake (verb)
study intensively, as before an exam
play a percussion instrument
make a rhythmic sound