As nouns the difference between scrub and mallee
is that scrub
is one who labors hard and lives meanly; a mean fellow or scrub
can be an instance of scrubbing while mallee
is a type of scrubland with low-growing thick eucalypts, characteristic of certain parts of australia.
As an adjective scrub
is mean; dirty; contemptible; scrubby.
As a verb scrub
is to rub hard; to wash with rubbing; usually, to rub with a wet brush, or with something coarse or rough, for the purpose of cleaning or brightening; as, to scrub a floor, a doorplate.