shareware vs software system

shareware and software system both are nouns.

Word	Noun	Adjective	Verb	Adverb
shareware	Yes	No	No	No
software system	Yes	No	No	No

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

shareware: software that is available free of charge; may be distributed for evaluation with a fee requested for additional features or a manual etc.
software system: (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory

Other hypernyms of shareware include computer software, package, software, software package, software program.

shareware (noun)	software system (noun)
software that is available free of charge; may be distributed for evaluation with a fee requested for additional features or a manual etc.	(computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory