/ Thesaurus / L Synonyms of library routine Find synonyms for: Noun1. library routine, routine, subroutine, subprogram, procedure, functionusage: a debugged routine that is maintained in a program libraryWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: magnanimous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language