/ Thesaurus / S Synonyms of system error Find synonyms for: Noun1. system error, instruction, command, statement, program lineusage: an instruction that is either not recognized by an operating system or is in violation of the procedural rulesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language