central heating vs heating

central heating and heating both are nouns.

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

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

central heating: a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators
heating: utility to warm a building

Other hypernyms of central heating include heat, heating plant, heating system.

central heating (noun)	heating (noun)
a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators	utility to warm a building
	the process of becoming warmer; a rising temperature