real property vs holding

real property and holding both are nouns.

Word	Noun	Adjective	Verb	Adverb
real property	Yes	No	No	No
holding	Yes	No	No	No

As nouns, holding is a hypernym of real property; that is, holding is a word with a broader meaning than real property:

real property: property consisting of houses and land
holding: something owned; any tangible or intangible possession that is owned by someone

Other hypernyms of real property include belongings, property.

real property (noun)	holding (noun)
property consisting of houses and land	the act of retaining something
	something owned; any tangible or intangible possession that is owned by someone