As nouns the difference between brusher and rusher
is that brusher is someone who brushes (any of the meanings) while rusher is a person who rushes.
brusher
English
Noun
(
en noun)
Someone who brushes (any of the meanings) rusher
English
Noun
(
en noun)
A person who rushes.
(American football) The fast defensive position whose objective is to sack the offensive team's quarterback.
(obsolete) One who strews rushes.
- I am rusher of the stable — (Ben Jonson).