[Oztrich Boy]

In many cases this is how we wound up with two words for the same thing. “Sick” and “ill” are an example. One is old English, the other is Norse. So we just started using both.

Even more noted in the case of the ON rein and the OE deer

[Paladin2]

Very kool:

" Origin:

1350–1400;

Middle English raynder ( e ) < Old Norse hreindȳri, equivalent to hreinn reindeer + dȳr animal (cognate with deer) "