point system vs system of rules

point system and system of rules both are nouns.

Word	Noun	Adjective	Verb	Adverb
point system	Yes	No	No	No
system of rules	Yes	No	No	No

As nouns, system of rules is a hypernym of point system; that is, system of rules is a word with a broader meaning than point system:

point system: a system of evaluation based on awarding points according to rules
system of rules: a complex of methods or rules governing behavior

Other hypernyms of point system include system.

point system (noun)	system of rules (noun)
a system of evaluation based on awarding points according to rules	a complex of methods or rules governing behavior
a system of writing or printing using patterns of raised dots that can be read by touch
a system of graduating sizes of type in multiples of the point