heating plant vs heating

heating plant and heating both are nouns.

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

As nouns, heating plant and heating are synonyms defined as:

Other synonyms of heating plant include heat, heating system.

heating plant (noun)	heating (noun)
utility to warm a building	utility to warm a building
	the process of becoming warmer; a rising temperature