Redden vs Rud - What's the difference?

As verbs the difference between redden and rud

is that redden is to become red while rud is (label) to become red; redden.

redness; blush.

(en verb)

To become red.

* 1769: , Bonnell Thornton (translation), "The Captives", The Comedies of Plautus , T. Becket and P. A. De Hondt, page 341

But I will make you blush; nay, I will make you redden all over.

To make red.

* 1794: , "Mithridates", Poems on Several Occasions , W. Gordon, page 258

Ere this had redden'd with my odious blood.

(-)

redness; blush

ruddle; red ochre

A fish, the rudd.

(rudd)

(label) To become red; redden.

To make red.

(Spenser)