alloy vs meld

alloy and meld both are nouns.

Word	Noun	Adjective	Verb	Adverb
alloy	Yes	No	Yes	No
meld	Yes	No	Yes	No

As verbs, meld is a hypernym of alloy; that is, meld is a word with a broader meaning than alloy:

Other hypernyms of alloy include blend, coalesce, combine, commingle, conflate, flux, fuse, immix, merge, mix.

alloy (noun)	meld (noun)
the state of impairing the quality or reducing the value of something	a form of rummy using two decks of cards and four jokers; jokers and deuces are wild; the object is to form groups of the same rank
a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten

alloy (verb)	meld (verb)
lower in value by increasing the base-metal content	mix together different elements
make an alloy of	lose its distinct outline or shape; blend gradually
	announce for a score; of cards in a card game