As verbs the difference between weld and arcweld

is that weld is to bind together inseparably; to unite closely or intimately while arcweld is to weld using an arc created by electricity.

As a proper noun Weld

is {{surname|from=Old English}} possibly deriving from the Old English word for woodland. The family is mainly located in the Southern regions of England.

As a noun weld

is a herb (Reseda luteola) related to mignonette, growing in Europe, and to some extent in America, used to make a yellow dye; dyer's broom; dyer's rocket; dyer's weed; wild woad.