uninominal system vs uninominal voting system

uninominal system and uninominal voting system both are nouns.

Word	Noun	Adjective	Verb	Adverb
uninominal system	Yes	No	No	No
uninominal voting system	Yes	No	No	No

As nouns, uninominal system and uninominal voting system are synonyms defined as:

uninominal system and uninominal voting system: based on the principle of having only one member (as of a legislature) selected from each electoral district

Other synonyms of uninominal system include scrutin uninomial system, scrutin uninominal voting system, single-member system.

uninominal system (noun)	uninominal voting system (noun)
based on the principle of having only one member (as of a legislature) selected from each electoral district	based on the principle of having only one member (as of a legislature) selected from each electoral district