demesne vs smallholding

demesne and smallholding both are nouns.

Word	Noun	Adjective	Verb	Adverb
demesne	Yes	No	No	No
smallholding	Yes	No	No	No

As nouns, smallholding is a hyponym of demesne; that is, smallholding is a word with a more specific, narrower meaning than demesne:

demesne: extensive landed property (especially in the country) retained by the owner for his own use
smallholding: a piece of land under 50 acres that is sold or let to someone for cultivation

demesne (noun)	smallholding (noun)
territory over which rule or control is exercised	a piece of land under 50 acres that is sold or let to someone for cultivation
extensive landed property (especially in the country) retained by the owner for his own use