boiling vs heating

boiling and heating both are nouns.

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

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

Other hypernyms of boiling include warming, evaporation, vapor, vaporisation, vaporization, vapour.

boiling (noun)	heating (noun)
cooking in a liquid that has been brought to a boil	utility to warm a building
the application of heat to change something from a liquid to a gas	the process of becoming warmer; a rising temperature

boiling (adverb)	heating (adverb)
passionately or agitatedly