weld vs spot-weld

weld and spot-weld both are nouns.

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

As nouns, spot-weld is a hyponym of weld; that is, spot-weld is a word with a more specific, narrower meaning than weld:

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

Other hyponyms of weld include spot weld.

As verbs, spot-weld is a hyponym of weld; that is, spot-weld is a word with a more specific, narrower meaning than weld:

Other hyponyms of weld include spotweld, butt-weld, buttweld.

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

weld (verb)	spot-weld (verb)
unite closely or intimately	make circular welds
join together by heating