class vs violin family

class and violin family both are nouns.

Word	Noun	Adjective	Verb	Adverb
class	Yes	No	Yes	No
violin family	Yes	No	No	No

As nouns, violin family is a hyponym of class; that is, violin family is a word with a more specific, narrower meaning than class:

class (noun)	violin family (noun)
education imparted in a series of lessons or meetings	(music) the family of bowed stringed instruments
elegance in dress or behavior
a collection of things sharing a common attribute
people having the same social, economic, or educational status
(biology) a taxonomic group containing one or more orders
a body of students who are taught together
a body of students who graduate together
a league ranked by quality

class (verb)	violin family (verb)
arrange or order by classes or categories