burnish

As a noun fire

is the sector of the economy including finance, insurance and real estate businesses.

As a verb burnish is

to make smooth or shiny by rubbing; to polish; to shine.

Buff is a synonym of burnish.

As verbs the difference between burnish and buff

is that burnish is to make smooth or shiny by rubbing; to polish; to shine while buff is to polish and make shiny by rubbing.

As a noun buff is

undyed leather from the skin of buffalo or similar animals.

As an adjective buff is

of the color of buff leather, a brownish yellow.

As an acronym BUFF is

big Ugly Fat Fellow (or Fucker); US Airforce nickname for the B-52 bomber.