melt vs de-ice

melt is a noun but de-ice is not a noun.

Word	Noun	Adjective	Verb	Adverb
melt	Yes	No	Yes	No
de-ice	No	No	Yes	No

As verbs, de-ice is a hyponym of melt; that is, de-ice is a word with a more specific, narrower meaning than melt:

Other hyponyms of melt include deliquesce, defrost, deice.

melt (noun)	de-ice (noun)
the process whereby heat changes something from a solid to a liquid

melt (verb)	de-ice (verb)
become or cause to become soft or liquid	make or become free of frost or ice
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