grow together vs fuse

grow together is not a noun while fuse is a noun.

Word	Noun	Adjective	Verb	Adverb
grow together	No	No	Yes	No
fuse	Yes	No	Yes	No

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

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

grow together (noun)	fuse (noun)
	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

grow together (verb)	fuse (verb)
grow together (of plants and organs)	mix together different elements
	make liquid or plastic by heating
	become plastic or fluid or liquefied from heat
	equip with a fuse; provide with a fuse