turnup

As a noun turnup is

(british) the cuff on a trouser leg that is, or can be turned up.

As nouns the difference between turnup and turnip

is that turnup is the cuff on a trouser leg that is, or can be turned up while turnip is the white root of a yellow-flowered plant, Brassica rapa, grown as a vegetable and as fodder for cattle.

As nouns the difference between turnep and turnup

is that turnep is obsolete form of lang=en while turnup is the cuff on a trouser leg that is, or can be turned up.

As nouns the difference between turnup and burnup

is that turnup is (british) the cuff on a trouser leg that is, or can be turned up while burnup is (physics) a measure of the consumption of fuel in a nuclear reactor.