spot weld vs weld

spot weld and weld both are nouns.

Word	Noun	Adjective	Verb	Adverb
spot weld	Yes	No	No	No
weld	Yes	No	Yes	No

As nouns, weld is a hypernym of spot weld; that is, weld is a word with a broader meaning than spot weld:

spot weld: each of the welds made by welding at a separate point
weld: a metal joint formed by softening with heat and fusing or hammering together

spot weld (noun)	weld (noun)
each of the welds made by welding at a separate point	a metal joint formed by softening with heat and fusing or hammering together
	European mignonette cultivated as a source of yellow dye; naturalized in North America

spot weld (verb)	weld (verb)
	unite closely or intimately
	join together by heating