procedure vs software system

procedure and software system both are nouns.

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

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

procedure: a set sequence of steps, part of larger computer program
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 procedure include computer software, package, software, software package, software program.

procedure (noun)	software system (noun)
a particular course of action intended to achieve a result	(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
a mode of conducting legal and parliamentary proceedings
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work
a set sequence of steps, part of larger computer program