Stuart vs royal family

Stuart and royal family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stuart	Yes	No	No	No
royal family	Yes	No	No	No

As nouns, royal family is a hypernym of Stuart; that is, royal family is a word with a broader meaning than Stuart:

Stuart: the royal family that ruled Scotland from 1371-1714 and ruled England from 1603 to 1649 and again from 1660 to 1714
royal family: royal persons collectively

Other hypernyms of Stuart include dynasty, royal house, royal line, royalty.

Stuart (noun)	royal family (noun)
the royal family that ruled Scotland from 1371-1714 and ruled England from 1603 to 1649 and again from 1660 to 1714	royal persons collectively
United States painter best known for his portraits of George Washington (1755-1828)
a member of the royal family that ruled Scotland and England