meld vs fuse

meld and fuse both are nouns.

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

As verbs, meld and fuse are synonyms defined as:

Other synonyms of meld include blend, coalesce, combine, commingle, conflate, flux, immix, merge, mix.

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

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

meld (noun)	fuse (noun)
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	any igniter that is used to initiate the burning of a propellant
	an electrical device that can interrupt the flow of electrical current when it is overloaded

meld (verb)	fuse (verb)
mix together different elements	mix together different elements
lose its distinct outline or shape; blend gradually	make liquid or plastic by heating
announce for a score; of cards in a card game	become plastic or fluid or liquefied from heat
	equip with a fuse; provide with a fuse