melt vs heating

melt and heating both are nouns.

Word	Noun	Adjective	Verb	Adverb
melt	Yes	No	Yes	No
heating	Yes	No	No	No

As nouns, heating is a hypernym of melt; that is, heating is a word with a broader meaning than melt:

Other hypernyms of melt include warming, phase change, phase transition, physical change, state change.

melt (noun)	heating (noun)
the process whereby heat changes something from a solid to a liquid	utility to warm a building
	the process of becoming warmer; a rising temperature

melt (verb)	heating (verb)
become or cause to become soft or liquid
reduce or cause to be reduced from a solid to a liquid state, usually by heating
lose its distinct outline or shape; blend gradually
become more relaxed, easygoing, or genial
become less clearly visible or distinguishable; disappear gradually or seemingly
become less intense and fade away gradually